Question
So, what exactly is furnace glass, and what makes it different than any
other type of glass beads?

Answers
Furnace glass is the name given to hand-blown-and-pulled canes of glass.  It’s
more complex than this, but basically a bubble streeeeeeetched into a long
tube, then sliced into bead length sizes and the ends polished.  I guess they
call it furnace glass because you need a whole forge full of molten glass, as
opposed to “lampwork” done with a small propane torch (“lamp”)

Associated What Is Furnace Question: So i went to turn on my furnace for the first time this year and no heat will blow out…..there is a fire going good in it ….but no heat will blow out….like it wont turn on…..what could be some problems

• Answer:How long did you have the heater on? It needs to be running for a few minutes before the blower will come on. There is a thermal switch that turns on the blower. It could be bad, or the blower motor could be bad. On your thermostat is there a switch for the fan that says “auto” and “on”? If so, turn the switch to on, and see if the blower comes on. If so, the thermal switch is probably bad.

Associated What Is Furnace Question: Why does my furnace create an odor when running?This is my 1st winter in a cottage that I am renting. Every time that my furnace is running, there is a bad odor throughout the basement where the furnace is located. It smells pretty bad. My neighbors have the same problem. My neighbors house is the same as mine and has the same owners. The furnace is really old also. What is causing this odor? It’s a gas furnace.

• Answer:Dirt and dust often collect in the furnace during the summer when it is not used, then when it is run for the first week or so, it will produce an odor that’s not pleasant. But if the smell persists, then maybe mice have gotten into it and made their nests. You may be smelling the mice urine and droppings as it all heats up when you run your furnace. It would be a good idea to inspect the furnace and the duct-ways for evidence of mice nests or other debris including mold.

Associated What Is Furnace Question: Whats the difference between an electric and gas furnace? as far as cost and upkeep go?I’m looking at Condos right now one has a gas furnace and water tank, while the other 2 have an electric(forced air) furnace and an electric water heater. Which is more expensive to run in terms of energy bills? Do Electric Furnaces last longer then gas? Are they cheaper to replace? Does an electric furnace use a heating element or what?(vs a gas using a flame) The one I’m looking at still has an electric furnace from the mid 70’s. Should i be worried?

• Answer:Electric is MUCH more expensive to operate. It uses something called “heat strips” to provide heat. Have you ever seen a fake fireplace that provides heat by blowing air over a coil that heats up? It provides heat but is very expensive to run because it has to keep the coil red hot to provide heat. Well that’s the same way an electric furnace is going to heat your condo, except it has strips that it heats up and blows air over. I would definitely go with the one with gas heat. By the way, a forced hot air furnace can still be gas. That’s what we had in New Jersey and my bills were not out of line. A gas furnace costs more to replace, but a lot less to operate. Same with a gas dryer. It’s more to purchase, but less to operate. An electric furnace from the 70’s is probably not a very energy efficient model so I would definitely think twice. Good luck with finding your new condo and happy moving!!

Associated What Is Furnace Question: Is shutting off the furnace a few hours a day a good way to save heat?I’m really trying to conserve on oil consumption in my house. I turn down the thermostat, my tenant does so as well. But the furnace still kicks in when the temp drops to what we’ve set them to. What I’ve tried doing is just to shut off the furnace on weekdays. I’m alone, so it’s no big deal for me. I turn it back on as soon as the tenant gets back from work. I’m wondering, does this really help or am I actually using more heat when the furnace restarts after being shut off for 6 hours? It also has to heat the hot water tank (30 gallons). Thanks for your input!

• Answer:I would not turn off the furnace completely for many reasons. It is very hard on your furnace when you do turn it on it has to work that much harder. Also it is very hard on your house. You are cooling and heating cooling and heating, there isn’t a set temp this way. Keep your temp at 64 or so. If your heat goes on it won’t be that often. It is not a good thing for your water tank either. You could create weakness in the lining from constantly up and down heating. It does however take a long time for a hot water tank to cool down. Better to keep you furnace on though!!

Associated What Is Furnace Question: What is involved in getting your furnace serviced?
I know I need to get my furnace service and my ducts cleaned — this will be our 3rd winter in our house and it’s never been done. What does duct cleaning and furnace servicing involve? Can you give be price ranges? Do they use a big vacuum type thing? Is there any drawbacks to having a furnace serviced? For example I know if you flush the transmission of an older car that hasn’t regularly been serviced the cart usually ends up with transmission problems — has anyone had similar problems with their furnace? Thanks in advance! I’m definitely having a professional come in and do it. I wouldn’t even know where to start myself — I was just wondering what the process is like.

• Answer:along with changing your filer every 2 months you should have the furnace serviced or [clean and checked]because they will check for cracked heat exchanger.oil the moter,adjust air/gas mixture,and visually inspect the various safety switch’s.it should cost about 50.00 for the service .as for the ducts being cleaned they will cover your air returns with cardboard .and put a vacuum to the supply registers.they also can add deodorizers and sanitizers.for about 200.00 .

Associated What Is Furnace Question: What can possibly be wrong with my furnace?What can possibly be wrong with my furnace? The temperature keeps dropping even though i set the temperature at 68F, and the furnace won’t run to raise the temperature back to 68F. So, why? I am sure it is a gas furnace, and i don’t think i need to reset it because it was running well just last night. This has occured several times, and i know the furnace is not broken but the temperature automatically drops even though i set to hold the temperature at 68F.

• Answer:wrong section but first off check your filter a dirty filter can make the pressure relief switch shut the furnace off and it will never stay on for a full cycle therefor never really getting the heat up to temp. If it’s not the filter you might check to make sure the furnace doors are on correctly there a switch that is usually on the door that if its not depressed won’t allow the furnace to kick on. Something blocking a flue (vent) can cause the furnace to kick off (again at the pressure relief switch) Other than those simple things that you can check yourself you should call a HVAC guy.

Associated What Is Furnace Question: What could cause my gas furnace to stop a few minutes after it stops?This furnace is less than ten years old and it’s been serviced every year. It’s been the fourth night we needed heat and more than half the time the furnace stops before heating to the thermostat setting. This has been happening at the beginning of the season every winter. Various technicians have looked at it, cleaning and replacing parts like the “heat sensor” or “flame sensor.” Should I just give up and get a new furnace?

• Answer:interesting, I have the exact same problem! I have forced hot air, not sure about yours. Other two answers above dont sound right, sorry. I usually,1) change air filter 2) clean the igniter (thing that glows orange) with a brass bristle brush which is probably not the thing to do. Then it seems to work right on its own. Really, no help here, just the same experience.

Associated What Is Furnace Question: What is the limiting reactant in the furnace when carbon monoxide is produced by accident?Houses in many parts of the country these days are required to have carbon monoxide installed in case of furnace malfunctions. Furnaces in most homes burn natural gas and are supposed to produce water vapour and carbon dioxide, both harmless, but can create problems when the wrong reactant becomes limiting. – What is the limiting reactant in the furnace when carbon monoxide is produced by accident? – What might have caused the problem and how can it be remedied? – How carbon monoxide us harmful to humans?

• Answer:Oxygen. ? Binds to haemoglobin, preventing oxygen transport.

Associated What Is Furnace Question: My hot water oil burner furnace is not circulating to heat baseboards. What would cause this?
The furnace is running and does come on to heat the water. However, when the thermostat is turned on the furnace will come on but not kick in so it just runs with the loud humming noise. Needless to say the baseboards are not getting heat. I have called a heating tech but they can’t get here until the end of next week and it’s getting pretty cold. Is there anything I could possibly check for or any ideas? Any help would be appreciated. Thanks.

• Answer:Try james’s plan, also the circulator pump may just be stuck from not running all summer. If you can get to the coupling, you may be able to move it with a screwdriver or something. From your story it sounds like the water is getting hot. If the burner doesn’t light and the water doesn’t heat up, that is another problem.

Associated What Is Furnace Question: What is the voltage and amperage of the electrical connection at my furnace?
I have a Coleman 7600 propane furnace heating a 1000 square foot house. The furnace has an electrical wire going into it to power the blower. At some point in the future I might get a woodburning stove and get rid of the furnace. So I’m thinking I also will be able to put an electrical outlet where the furnace is now. What kind of electrical connection (voltage and amperage) would have been installed for this furnace?

• Answer:Would have 120 volts with a 14/3 wire on a 15 amp breaker. Check Panel box to be sure.I did ele work before retiring.

Question
The joint venture will be called water+(TM) and is based upon a patented
process developed by Jim Hardin, founder of Hardin Geotechnologies. The
new
process uses the municipal water delivered to any home or commercial
building as the vehicle to absorb or extract heat.

Answers
This is the type of stock that you would expect to find on the Vancouver
Stock Exchange or from a M.L.M. company.  I think that I would invest my
money else where.
Since when do water utlities have return lines?  Or are they talking about
the sewers, if so this is old tech.  Some cities have banned the use of this
type of refrigeration because of the large amount of treated water wasted
and requires a lot of maintanence in areas with hard water.  I was once
called to repair a walk-in cooler in a store that some one had turned the
water off in the building to repair a toilet and didn’t know that the milk
cooler used water to cool the compressor coils.  It was an expensive toilet
repair.
This technology was more popular before water meters started to be
installed.

Question
Used our new (2 yr  old) Tioga 22E for the first time last w/e.  We
found out the coach batterey doesn’t hold much of a charge.  Around 3
a.m. the smoke alarm went off, I woke up, it was cold, the furnace fan
was barely blowing.  And something smelled smoky.

Answers
You didn’t tell us what brand of furnace so we have to guess.  I’m
going to guess it is quite similar to the one in my
Itasca/Winnebago.  The smokey smell was your furnace burning with
too little air because the draft fan was undervoltaged.  Smoke
likely backed up and leaked into the compartment (not supposed to)
and tripped your smoke detector.  Looking at the schematic in the
manual, I see that it is a very simple spark direct ignition furnace
with a sail switch to prove draft before ignition.  No apparent
provision for undervoltage trip.  As the draft fan undersped from
low voltage, the sail switch should have tripped the furnace off.
Looks like you have two things you need to check out.  First, find
out where the fumes leaked into the cabin.  Second, find out if your
furnace has a draft switch and if so, why it didn’t work.  If it
does not have a draft switch, I’d be figuring out some sort of
undervoltage shutdown for the furnace, for operating without
sufficient draft is dangerous.  You might also look at where the
furnace exhaust is relative to windows and other sources of inside
air.  Mine is right above a window.  I know not to open that window
if the furnace is to be used.

Associated Smoke Detector For Inside Furnace Question: oil furnace odor & black soot?
I bought my 1950’s cape cod in CT in Sept 2008. The forced hot air furance was inspected and cleaned, and passed without comment. I have a 200+ oil tank that I fill about two times per year. I planned to have the furnace cleaned in the spring of 2010. However, I have not had anything done to it between 2008 and now (Feb 2010). But for I coudl have it cleaned/oil filter changed, the smoke stack has noticeable black smoke and small flakes of soot land on the roof. After only 2 days of this the inside started to smell of fumes (My carbon detector did NOT go off) but the smell is too strong for my family. I plan to have a furnaces/ HVAC tech clean/inspect ASAP. What should I ask them to do? maintenance

• Answer:Ask them to check the furnace for proper combustion and ventilation. Make sure you have a source of combustion air (AKA make up air) to the furnace.

Associated Smoke Detector For Inside Furnace Question:Question about landlords coming into my apartment twice a year for inspections. Is this legal? ?
Are they just using this as an excuse to snoop around or spy on my while i’m gone at work? I get a note every six months from my landlord at the large apartment complex i live in. It says that they will be changing the furnace filter and doing various inspections, INSIDE my apartment. They say that it’s mandatory and there are no exceptions. They don’t cite any laws, they just seem to have made up these rules. Just because they own this building doesn’t mean they can barge in here twice a year whether i’m home or not, can they? I can change the friggin filter myself. I can test a smoke detector myself. I’m tired of people violating my rights and privacy just because they think we are too stupid to do things ourselves.

• Answer:What’s your lease say? You say the landlord “just seem to have made up these rules.” What you’re describing is very typical, and should be in your lease. As for legal: Yes. It’s legal. Yes, just because they own the building, they can barge in twice a year. In fact, your lease probably provides that they can enter your apartment upon reasonable (often 24 hours) notice, and can enter without your permission in the event of an emergency. Maybe you can change the filter yourself. Maybe you can test a smoke detector yourself. Other people can’t. Or won’t. And if your neighbor’s smoke detector isn’t working because the battery’s dead and a fire breaks out, you could be injured or killed. They’re not violating your rights and privacy. Again, read your lease. You’ve given them explicit permission to do as they’re doing. If you really don’t like it, buy a home of your own.

Question
As the season is getting a little chilly here, I started up the gas
furnace last night. Having extinguished the pilot light at the start
of the summer season, I lit that first and then started up the
furnace. After a minute, something smelt like it was burning. The
smell was coming up through the heating vents.
My own belief is that some settled dust in the vents may be burning
off. Has anyone else suffered a similiar problem when starting up the
furnace ? Anything to worry about ? Note, the gas company agrees
with me in that it may be dust. That’s why they recommend leaving the
pilot light running through the summer.

Answers
I observe the same thing each fall. I have no pilot but an electric ignition.
Here on Long Island the Oil Heat Institute says ” OIL HEAT- IT’S SIMPLY BETTER”
I say “WRONG !”

Associated Smell Furnace Question: What would cause a burnt plastic smell when furnace is running?
This morning, we started noticing a burnt plastic smell (primarily in our bathroom and kitchen) when the furnace is running. You can sort of smell it in other rooms, but it is more prevalent in the bathroom and kitchen. We have a gas furnace. Any ideas on what could cause this?

• Answer:I don’t want to scare you, but that could be wiring insulation melting. Have a furnace place check this out ASAP!!

Associated Smell Furnace Question:Why do I still get this smell from my furnace when the fireplace is burning? Help Help Help?
main furnace – heatpump. emergency backup – oil burner. only use oil when pump cant sustain. when fireplace is burning and furnace comes on – i get a gassy smell from the registers blowing out. read all about this backdrafting and added a fresh air vent (although not very big) that leads right to the furnace. still getting smell, but only when fireplace is burning. have been reduced to turning off furnace when burning fireplace. have since read furnace materials and for the oil burner it specifically says to not vent into chimney if it’s used with an open fireplace. DING DING DING! mine is. my question is – why do i still get the smell when not using oil burner? is the air from the chimney with fire gases still being sucked down into the blower and spread throughout the house even though the heatpump doesnt need vented? if the fire is creating mad draft up the chimney, how does that stuff get sucked back down at the same time into the blower? this is keeping me up at night! help me! let me make clear that this only happens when we are burning the fireplace which is only on weekends from about dinner time until we go to bed. it’s not that we have this going on 24/7 or even 24/1.

• Answer:I don’t know weather you own or rent your house but, for what I’m reading here, you have a very dangerous situation. Stop using the furnace and the fireplace until you can find out what is going on. Remember, your breathing in these fumes, and you eventually feel the effects of it, not to mention the threat of a fire breaking out in your house. Call the gas company to come out and check your furnace. Good Luck

Associated Smell Furnace Question:Weird smell from furnace, could duct cleaning help?
Okay, I moved into this house last winter and ever since we have had a horrible smell coming from our registers/air returns. Even when the AC or heat is off, you can still kind of smell it lingering. It is kind of musty and just feels like we’re breathing in dirt. It is NOT a dead animal. Our house is also really really dusty. We do have 3 cats so I know that adds to it but I also bought an air purifier for my room and it doesn’t help at all! We change the filter monthly and just bought a more expensive kind that is washable but nothing helps. We had someone come out and check it and he said the coil was fine but there was a huge pipe coming from the attic into the furnace which he sealed off. We thought maybe that was causing the smell and dust but that still didn’t help. The only other thing he could think of was getting the air ducts cleaned. Do you think this will help? I tried to bleach them out myself but the dirt was caked on and I couldn’t get any of it out.

• Answer:Duct cleaning would certainly help. As would checking that the pipe that was sealed has REMAINED sealed… you know, heat or vibration or whatever may have dislodged whatever the serviceman used to seal it off. I have three cats, too and while that might contribute a “bit” to the dust/dander issue, it’s not gonna be by much, and certainly not to the point where I’d say my house is “really dusty.” I use a feather duster on all my flat surfaces weekly and follow-up by vacuuming and have no noticeable dust. You might want to try changing your air filters twice a month (buy a 10-pack of the cheapo paper filters for this experiment) for a couple of months to see if the air in your home being sucked through TO the furnace is the issue or the air coming FROM your furnace is the problem. If the filters aren’t disgustingly dirty every two weeks, it’s likely the culprit is the air discharging from your furnace and, obviously, through the air ducts. If the furnace filter is changed regularly, then you’ve pin-pointed the isue… your ducts. Hope this helps, Â Â TX Griff

Associated Smell Furnace Question:My central air conditioner knocks out my furnace pilot light & I am getting gas smell in house?
There is no odor when pilot light is lit, but the a/c keeps blowing it out & sends gas smell through the house. I tried keeping pilot off & turning off the gas flow to the furnace but this resulted in a stronger gas smell in furnace room . Any help on keeping the pilot lit would be fantastic

• Answer:You definitely have a problem. Follow the gas line from the furnace and turn it off and call for service right away. There is a safety that should shut the gas off if the pilot goes out, so if the pilot is out there is no reason you should be smelling gas. It is odd that the pilot blows out when the a/c is running. It sounds like the fan is blowing air into the heat exchanger which would indicate that it is cracked. I’m not sure if that is the case, I am just speculating. You need to have it checked out right away.

Associated Smell Furnace Question:A strange smell coming from my furnace, what could it be?
A few weeks ago, I noticed a strange smell emanating from my furnace. It’s a central furnace system. The strange thing is, the smell is only around the furnace itself. It’s an extremely pungent and nauseous smell – kind of sulfuric. It has me really concerned, and I stopped sleeping in my bedroom which is across the hall from the furnace, because I smelled the strange smell in my room. Thanks for your help in advance. It can’t be because dust is burning, because the pilot light isn’t burning – it was extinguished.

• Answer:you turned the pilot off and still have gas leaking

Associated Smell Furnace Question:Is it normal to have a propane smell after a furnace kicks on right after a new motor is replaced in furnace?
Had the motor replaced in my oil burning furnace. Since then (a week ago) it smells like propane immediately after the furnace kicks on (it never did with old motor). Is this normal for awhile after the motor is replaced or is it something to be concerned about? I called the oil company (who fills my tank and did the replacement) and the secretary (who I don’t really think has much of a clue) stated it is “normal” in all homes when a furnace kicks on, but mine never did before the new motor. Is this really “normal”?

• Answer:No you shouldn’t smell it and if you do you are probably getting Carbon Monoxide also have the company that installed it come back out and do a carbon monoxide test.

Associated Smell Furnace Question:Why is my electric furnace creating a burning smell?
My furnace is causing my heat and smoke detector to go off from time to time. It creates a burning smell for a minute or two and then goes away and the detector stops beeping. My furnace is only about 4 years old and the filter is clean. I am uncertain if it is a dust or wire smell.

• Answer:Before calling a service technician, I would disconnect the power, open the face panel, and clean out the inside with a vacuum. Clean out all the dust. Look for signs of burnt material around the motor just in case. Lubricate the fan motor. This should be done on an annual basis.

Associated Smell Furnace Question:Strange smell from my furnace?
I have noticed an akward smell coming fomr my furnace. The heat company person came to my house and said everything was fine and he believes it smells like burning metal, but he is not sure what metal would be burning. We turned the thermostat on after he cleaned eveything out. Now he states he will report to my landlord that it is fine and he told me to run the heat for a few days while i leave my house and hopefully it will be gone. It makes me dizzy, but he states it shouldn’t What do you think it could be?

• Answer:It’s completely normal. If you don’t use a furnace for a while (over summer, for example), the heating element can get a buildup of aerosol sprays, cooking vapors and smoke, dust, etc. So, when you turn it on the first time in fall or winter, that residue has to burn off. Just keep your house well ventilated and run the furnace for a couple of hours. The smell will go away after the residue burns off.

Associated Smell Furnace Question:is it normal to smell a faint smell of gas when your furnace is running and you have your nise right on it?
just had a new furnace installed and i smell a small amount of gas when im right next to the furnace was told that its venting that i may smell? is that true its a brand new furnace , connections all seem tight, any ideas what it may be?

• Answer:Yes, it is normal, but you might want to have it checked out just in case. The pilot light can give off odors.

Associated Smell Furnace Question:Why is my furnace smell like it’s burning?
I turned my furnace on for the first time this year this morning and it smells like something is burning. And it is making a buzzing noise. My neighbor said it was the “dust” burning off that its collected all year.. Just wondering if there’s any other senarios and is this safe? And should I try going in the attic to dust it off?

• Answer: This Question has not been answered yet! Send us Your best smell furnace Answer!

Question
We have a wood furnace that requires a thermostatically controlled fan.
Technically we should not have a fire in the furnace if the electrictity
is off.  This year we have had numerous power outages every day and
sometimes have full roaring fires going just when the power goes off.
Here is the question:  Is it possible to use an alternative power source
for the fan?  I used to live with 12 volt power and am wondering if it
would be possible to hook up a 12 volt system with a DC-AC inverter
(cost?) to run the fan when the “grid” is down?  We had thought of a
generator but the fan does not run continuously so that is not possible?
No one around here has any ideas of what I am talking about or where to
get info…..ideas/names/addresses/feasibility would be appreciated.
Please email me privately as I don’t usually read this newsgroup.  Thanks

Answers
I think that this would be easy to do.
What you need is a DC to AC inverter.

This inverter would be connected permanently
to the battery and fan. I think they cost less
than $70us(?) for the small size that you need.
Try looking in automotive parts stores or the
local discount store. Make sure that the size
it is sized large enough to run the fan.

Next you need a good quality battery charger
to continuously charge the battery. This charger
must be of the type that can remain connected to
the battery permanently.

Last you need a deep cycle battery. I would suggest
a trolling motor battery as they are cheep and
won’t actually be used very much.

Associated Should Fan Be On When Furnace Is Off Question: I hear a humming noise from my furnace when I try to turn the fan on, what should I do?
I have Lennox furnace and whenever I turn on the fan without air conditioning, I hear a humming noise and the fan doesn’t spin. But whenever I turn on the air conditioning the fan is running fine. Also, when I turn off the air conditioning, the fan continues to run normally. So every time I want to turn on only my fan, I would have to turn on the A/C on and turn it off again. Any suggestions? Thanks.

• Answer:HVAC Tech.: The hum you hear might be the purge blower running, this should happen first in the light up process. the sequence is staged so that the purge is first, the unit lights off, when it heats up enough the blower comes on and warm air comes out. When the heat setting is reached the fire goes out, then as the thing cools down then the blower turns off last. Hope that helps you!

Associated Should Fan Be On When Furnace Is Off Question:Motor Fan in force air unit does not turn off?
I have a force air unit (gas heater & AC) where everything works find except in the heating mode. In the winter the gas furnace goes on and heats the house properly. Normally when the house reaches the right temperature, the gas burners shuts off and the fan motor should continue to run for about a minute or until the furnace cools off. The problem that I have is that the motor fan in the unit does not shut off (even after the unit has completely cooled off) and continue to run indefinitely. The only way to shut off the motor fan is to the turn off the unit at the thermostat from the “heat position” to the “off” position. I have replaced the thermostat and this did not fix the problem. I have the feeling that there is heat sensor in the gas unit that has gone bad, but I don’t know where to look for this sensor or what this senor mite look like, Can anyone help me fix this problem? The fan motor continues to run even if the fan switch is in the “auto” poistion.

• Answer:Check druid’s suggestion, but if it’s not that it may be a faulty relay. Newer furnaces have control boards with mini-relays on them (which frequently fail). Most techs simply replace the entire control board because labor costs prohibit repairs to the faulty part.

Associated Should Fan Be On When Furnace Is Off Question:HVAC fan run every so often even when is system is turned off. What can cause this?
The thermostat (White Rogers) has two settings for the fan (auto and on). Right now, the fan it is set to auto. It has another switch with three settings (i.e. cool, off, heat) and it is set to off. The fan still comes on for a few minutes every now and then. Since, the system is set to “off” and the fan is set to “auto”, the fan should not come on at all. The furnace works perfectly and when I turn on the heat it turns on the fan too. So there is nothing wrong with the system other than this fan running every so often. Here is what I have tried so far: Changed the batteries in the thermostat. Changed the air filter. Reset the thermostat to factory setting so that it is not programmed. .

• Answer:My answer only applies if your furnace is gas and if it is an older furnace. There is a control on the furnace called a fan/limit control. I have a link to what the control might look like below. The control brings on the blower during a call for heat. When the burners fire, the control delays the blower coming on until the heat exchanger gets warm enough. The fan/limit control has a 5, 8 or 11 inch probe that protrudes into the heat exchanger area. The probe contains a bi-metal spring that expands, causing the dial on the control to start turning. When it reaches the temperature setting on the control, a switch is engaged causing the blower to run. When the burners shut down, the bi-metal spring cools and contracts, then the dial turns the other way until the switch is disengaged, causing the blower to turn off. If your furnace is in an attic, the heat from the attic can cause the probe to get warm, expand and engage the switch, causing the blower to run for a few seconds until the probe cools off. The bi-metal probe is either getting weak or the settings on the dial need adjusting.

Associated Should Fan Be On When Furnace Is Off Question:Why are the burners in my Amana furnace not turning back on when the temp goes below the thermostat setting?
The gas burners turn themselves off when the house reaches the set temperature, as they should, however, the fan stays on, but the burners do not turn back on when temperature falls below the thermostat setting. I can only get the burners to go back on if I turn off the power to the furnace and switch it back on. The igniter seems to be fine.

• Answer:sounds like the control board. when your shutting off the power your basically resetting the board, if it was a fan limit the fan would not come on at all, unless your furnace is very old you wont have a thermocouple and you did state that your ignitor was fine. depending on the model of furnace you have the board will cost between 100 to 250 dollars. i have a carrier and the board for it was listed at 269.00

Associated Should Fan Be On When Furnace Is Off Question:Why is my furnace cycling on / off?
Ok, here’s the real story, I fix things for a living but I get stumped once in a while. My own home’s forced air gas furnace is giving me a run around. A few years ago, I installed an electronic pilot ignition system in it to replace the original standing pilot. I also raised the size of the blower fan pulley a little to try to boost performance. The ignition has worked flawlessly ever since but I have subsequently lowered back the pulley size..too noisy etc. The issue is, mostly in cold times, when the (digital) thermostat calls for heat, the ignition triggers, flame detection responds and main valve fires…all normal. The main burner continues for awhile heating the box until the temp / fan switch raises and triggers ultimately starting the blower…again all normal. Then, once the blower is running, while watching the temp / fan switch, it slowly begins to lower (presumably because the blast of cooler / cold return air coming into the box). Unfortunately it continues and gets to a point where it then shuts the blower back off to keep the unit from blowing cold air into the house. The burner stays on…never goes out…because the thermostat is still calling for heat. Then, we wait for the box to again raise in temp (remember burner is still on) to a point where the temp / fan switch will once again raise and turn on the blower moving warm air into the house….but also cooler / cold air back to the box via the return duct. The cycle continues, blower on for a little bit, temp sensor gets cooled by incoming air, blower shuts off….repeating on, and on, and on, The temp / fan switch was replaced a couple of years ago. Filter is new…actually no filter right now, but access door for the filter is sealed shut to prevent outside air from entering the return duct. The high limit setting on the temp / fan switch it is about 180 to 190….it never gets to that point, The trigger on (fan on) set point is about 125 to 150, the trigger off (fan off) point is about 65 or 70. The burners look good…but all I can think of is the unit is not putting out the level of heat it should and can’t keep up with the temp of cooler air returning back to it. In thinking about this, I think the problem has been occurring probably since the conversion to the electronic ignition (maybe before) which included a new main combination valve. I am thinking of bringing PG&E in to look at the flame to see if it seems too low…but in my years of working on every kind of equipment around…including many furnaces…the flame looks fine to me…short bright blue flame rising about 3/4″ from the top of the burner with a longer tail of blue and yellow raising 4 inches or so above that. Maybe it needs to be higher…I am not familiar with a level adjustment of the flame on the control valve…just the air mixture via the burners adjustable air dampners. OK experts…got any suggestions?

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Associated Should Fan Be On When Furnace Is Off Question:The fan on my gas furnace is running constantly, and the heat is not coming on either. Why?
The pilot light is on, but the unit still does not light up like it should. I am not sure if the fan is on all the time because it is just trying to bring the room up to temperature. I have done everything including: 1. Turn off the thermostat, then turned back on 2. Turned off the switch on the furnace that seems to turn off the fan. 3. Turned off the furnace by turning the gas switch to the off position. 4. Reset the breaker in the house. Not sure of the age of the unit, but definitely under 27 years old since that is when the house was built.

• Answer:The problem is that you have a limit switch opened on your furnace.. Which causes the fan to run constantly and wont let the gas valve open. Some limit switches are auto reset others are manual reset which means you must reset it yourself. Take the front cover off of the furnace. Look against the back part where all the electrical parts are. First turn the breaker off please. With out knowing the exact furnace just start looking at all the electrical componets and push any buttons you see on them you will know when you hit the right one, it will click. Turn the power back on and set your t-stat this should solve the problem

Associated Should Fan Be On When Furnace Is Off Question:My house smells like burnt oil from furnace. Please help?
I have lived in this house about 3 years and have had my furnace serviced every year. The problem is the service tech can never seem to find out or care about the smell just as long as its efficient 85%. I have a Beckett furnace and burnham boiler with the forced air exhaust out the side of the foundation. It seems the smell is the worst whenever the furnace is not working. There is no oil leak. When i stand over the boiler, it seems to smell like oil coming out of it. What could be causing this? Unburned oil sitting in there between firings? The exhaust fan not on long enough and air coming back in? How long should the exhaust fan operate after the furnace shuts off?

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Associated Should Fan Be On When Furnace Is Off Question:What might have caused my gas furnace to quit? What questions should I ask the repairman?
This morning my gas furnace (Trane) suddenly quit and made a sound like a dying propeller engine on a plane. When I tried to restart it (I set the thermostat to hold at 72 degrees and turned it on ‘Auto’) the inducer fan came on and about 10 seconds later the burners started. At that point the inducer fan and the burners suddenly cut-off. The furnace then tried to restart itself (unsuccessfully) every few seconds. I’ve called a professional but I want to make sure I’m not getting over-charged. What are the possible problems and what questions should I ask the technician?

• Answer:This unit does not have a thermocouple. It sounds to me like the impeller in the inducer motor has shed a blade or two. If the impeller losses a blade or two then it may provide enough draw to make the pressure switch but not once the hot flue gases start rolling through it. Here in Ohio, that repair would cost you roughly $325.00

Associated Should Fan Be On When Furnace Is Off Question:Furnace Will Not Ignite-Fan still Runs?
My furnace will not ignite. It doesn’t even sound like it is trying to ignite-as if it is not even getting a signal from my thermostat. Here’s the thing, my fan keeps running. Even when I shut my entire system off from the thermostat, the fan continues to run, My inside temp is 66 degrees and the thermostat is set to 72, so the heat should kick on, but it doesn’t. I have an electronic ignition electrode that sparks to ignite the pilot, which in turn lights the burners…however the spark is not present, not even the sound of it trying to spark. Should I replace the spark ignition electrode, or should I start with the high temp limit control Sensor/switch? I have had several people tell me its the circuit board, but I don’t think its that. The fact that the ignition assembly isn’t even firing is telling me maybe the limit switch was shorted somehow or is old and needs replacement. Please advise and thanks for the help!

• Answer:Sounds like a bad relay. The signal from your thermostat is not being recognized. It could easily be the circuit board because it works off of 24 volts. But, its your money.

Associated Should Fan Be On When Furnace Is Off Question:Why is my central air / furnace freezing / icing up?
The part that is icing over is the pipe that goes from the furnace outside to the central air unit. I had it checked by a professional and I was told that my pressures & freon levels are fine. My filter was changed a week ago. However, it was rather dirty when it was removed. The professional told me that he didn’t know what was wrong. He said my central air unit is rather old. Therefore, I need to buy a new central air unit. My furnace is less than a year old and I am afraid that if it continues to freeze, it is going to hurt my furnace. I turned my furnace off with only the fan running for over 24 hours. It appeared to be completely thawed out. It iced back up once I turned on the air conditioning again. What should I do? Is it possible that the central air unit is fine (since it is maintaining the correct pressure and freon levels)? Is it possible that the pipe going from my furnace to my central air unit just needs replaced? Thank you for your replies. The furnace is new so I wouldn’t think that it would need a good cleaning yet, would it? The furnace is under warranty so that is why I have to use the company that told me that he didn’t know what the problem was. If I call another company it may void my warranty. How would I check the coil for dirt?

• Answer:Good thing there is a 30 percent tax credit on new ones this year. Usually freeze ups are caused by low levels of freon. Could be your professional didn’t want to work on old unit. Maybe a second professional opinion is in order?

Question
I’ve had a Lennox Pulse furnace for about four years, and I CANNOT recommend
that anyone buy one.  In the last four heating seasons we have not had one
month of satisfactory service from this furnace.

The main problem we’ve had is that the furnace keeps shutting off midway
through the heating cycle.  Of course it would restart, but then a little
while later it would shut off again.  Usually when the service people came
out the problem woud be “fixed” for a couple of days.  Usually the problem
is diagnosed as a part that’s gone bad, very uncommon this early in these
“high quality” furnaces, yet we have had the following items replaced so far
(some under warranty, some at my expense): thermostat relay, gas valve, and
the controller board.  Plus the mounts for the heat exchanger seem to have
failed, but the service person suggested waiting for spring to fix that.
Also, we’ve had a gas pressure regulator installed, the gas pressure
regulator replaced after a year.  Oh, yeah, and the air cleaner power supply
had to be replaced this spring.

That gas valve was replaced last Thursday.  Friday, Saturday, and Sunday
morning, as the house was recovering from nighttime setback, the furnace
would come on for a while and then start up with this on/off crap.  You can
bet I was on the phone first thing Monday morning.  The service people
couldn’t offer any explanation, so we’re waiting for the next cold spell to
have them see for themselves.

These service people really don’t seem like bozos, and they seem like they
know what they’re doing other than that they can’t find the damned gremlin
in my system.  I don’t know what to do.

More advice:  If you DO decide to go with a pulse furnace be aware that the
“gentle hearbeat” quickly becomes an invasive hum that permeates your home.
It grates on your nerves.  And, since there is vibration associated with the
technology, the furnace WILL work itself out of balance to the point that
the hum becomes a conversation-stopping roar.  The fix is to have the
service person remove the fan cage to get deep into the bowels, and
rebalance the combustion chamber.  Even when properly balanced and tuned the
sound put out by the Lennox Pulse furnace can cause bottles in our fridge
and the coils in our toaster to resonate.

Any suggestions welcome.

Answers
I have had two Lennox pulse furnaces for the last two years.  I have
had no problem with them.  In your case, I wonder if it is the
furnace or it is the service “technicians”.  As most of us have
experienced some time or the other that all Hightech appliances
are hard to service, for obvious reasons.  Service people are
no where near trained to the level of advance technology that
hightech devices require.  Diagnosing a problem in todays’s cars,
todays’s electronic dishwashers, etc, is to start replacing
parts left and right until the problem solves itself! A friend of
mine’s car showed overheated indicator – the dealer replaced first
the coolant pump, next the battery, next the whole control module,
and fianlly the heat sensor!

Lennox definitely deserves the blame for (a) not training the service
people adequately and (2) making the problem hard to diagnose.

Let me take a stab at some possible causes for your problem.  Most
furnaces will shutoff if either (a) heat exchanger gets too hot or
(b) the blower motor gets too hot.  Either case should not happen
under normal circustances.  Three abnormal situations are likely.
(1) The thermostat is set too high when the outside is very cold and
the house poorly insulated – making the furnace run constantly.
(2) The home owner has closed several vents, thus causing a load on
the blower and reducing effective heat transfer.  When (1) and (2)
are combined the shutoff becomes much more likely. (3) The heat
sensor on the motor or the heat exchanger is malfunctioning.

Associated Pulse Furnace Question: why does lenox pulse 21 furnace not blow out of the registers very good?
my lenox pulse 21 furnace seems like it is not putting out enough heat at the registers around the house it seems like the air flow is restricted

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Associated Pulse Furnace Question:Why can’t I find parts for a Lennox G21 Series Pulse gas furnace?
If you go to the Lennox.com/owners/manuals website, the model is not even listed! My problem is this: There is a component inside the unit made by Johnson Controls. Depending on where you look, (and believe me, I’ve loked PLENTY) it’s variously called an “ignition control(ler)”, burner control, flame controller, etc. It’s m/n is G891TCA-8102, it’s p/n is 34K8301, and I have founf it listed by repair companies as a 1GM60JOOA and/or 60J00. Mine works intermittantly, and when it doesn’t, if you tap it lightly w/ a screwdriver you can hear a relay on the board pull in and the purgr/ignition cycle begin. Does anyone else experience this problem? Short of buying a new component, which is $330, is there any way to correct the problem? Is there anything else I should look for? Does anyone else have a better price? Would you advise I install it myself, or have a pro do it?

• Answer:The furnace is obsolete,but the part has been upgraded. There is no other way to repair the board….you will have to buy a new board & have a licensed A/C & heating tech install it for you….call around to each company for a price estimate first…….

Associated Pulse Furnace Question:i have a lennox pulse furnace and would like to make a muffler for the exsaust, anyone know how?
i have a lennox pulse furnace and it works great, but i’m getting tired of the exsaust noise, i see they make a muffler for them but they cost dam near 200 buck each, so i thought i bet i could make one

• Answer:Not a good idea. Couple of reasons. You may end up with too much back pressure and the furnace wont vent properly. If it runs at all, it will be running too hot, which will not be good for the furnace. You could also end up with exhaust gases “backing up” into your house. You don’t want to be breathing carbon monoxide or any of the other gases in there. What you are proposing to do is actually “altering the appliance” with an uncertified component. If there was ever a fire and you had people hurt or property damaged, insurance companies would not pay and you would be liable. Suddenly that $200 bucks doesn’t sound like a lot does it? It’s worth the piece of mind knowing the muffler was made specifically for that furnace and it will be perfectly safe operating with it.

Associated Pulse Furnace Question:Lennox Pulse Furnace ignites then dies a few seconds later.?
My 1989 lennox pulse g14 furnace will start the purge fan then start burner and then the burner will die a few seconds later, then 30 seconds later it will start up and run fine. It is every other time the furnace is started that the burner goes out after a few seconds like clockwork. I have cleaned and checked the spark plug and the flame sensor. Should I replace the flame sensor or ? Good educated guesses. I did take the purge air box cover off and I vacuumed about 10 dead Bumblebees from around the purge fan so maybe it is a clogged inlet pipe. I will take the air box cover off again tomorrow and let my shop vac suck on the inlet pipe inside the unit while I blow my leaf blower in the inlet from the outside and I’ll see what I get in the vac.(No pun intended). I will also take the air flapper off to clean it up just in case it’s clogged. That’s very true about the Heat exchanger I will buy a carbon monoxide detector or two but replacing the Furnace is not an option right now. The last time the heat exchanger was pressure tested for leaks was 9/2005. I’ll keep you posted. Inspected and cleaned the flame sensor, spark plug, Air flapper, purge fan, vacuumed out air intake box and inlet piping and blew compressed air through condensate drain but the furnace is still shutting down after a few seconds of ignition on first start up but running fine otherwise. I did notice today that when the furnace has not been ran for hours it will stay running on first attempt but the problem persists every other attempt after the successful cold start. Pressure switch maybe or??

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Associated Pulse Furnace Question:Furnace Wont light (lennox pulse gc-1)?
I have a lennox pulse furnace Model gc-1. When i turn the unit on and call for heat the furnace starts clicking for around 6 seconds then stops for a short time. then tries to light again and stops. after about 5 times a red service light comes on and stays on. ( no blinking) the light is on the Ignition control board (black box where the spark plug goes in?) If i cycle the power off and on repeatedly for a while sometimes it will light and the blower will kick on and it will heat up. but that’s only if im lucky. Any ideas what it may be? i cant afford a tech person

• Answer:Honestly, even if you can’t afford it you are gonna have to call a Lennox tech on this one. Due to some MAJOR problems and lawsuits that Lennox had regarding these Pulse furnaces several years ago most HVAC companies won’t touch them, leaving only a Lennox dealer who will work on them. Leave it alone and call a Lennox dealer, the furnace is not user serviceable.

Associated Pulse Furnace Question:Lennox Pulse furnace kicking on and off?
I have a 20 year old Lennox Pulse furnace. It switches on normally when the temperature goes down, but it switches off after running for a minute or so, even though the temperature hasn’t gone up. Then it switches on again in a minute or so. It keeps cycling like that. Sometimes, it runs only for a few seconds. What could be the problem? Just wanted to add this to my question: The furnace is still heating the house, though slowly due to the short cycles (so, pilot must be lit). I can see water coming out of the drain pipe off the trap. Would it still be clogged? I have to cut the PVC to clean out the trap. Will try that this evening. Also, I will try replacing the thermostat. Also, if it helps, I hear a clicking sound when the unit prematurely shuts down at the end of a cycle.

• Answer:sounds like you may have a bad spark transformer, or sparker.

Associated Pulse Furnace Question:I have a Lennox Pulse G21 Furnace installed April 21,1994. Is there a heat exchanger corrosion problem?
I understand that the corrosion problem occurred on Lennox Pulse Furnaces that predate 1990, is this this correct? Therefore our 1994 model should be fine?

• Answer:You should have your HVAC unit checked at least once a year, twice if you have AC. The technician should be NATE certified. A rusted Heat Exchanger can release Carbon Monoxide into your house which can and does kill. A preventative maintenance cost is a small price to pay for your safety

Associated Pulse Furnace Question:What is the Lennox Pulse 21 heat exchanger recall?
I have a Lennox Pulse 21 furnace installed around 1996 or so. A heating & cooling company came out today to discuss installing A/C on the unit. After looking at the heat exchanger, he told me there was green corrosion and subject to Lennox’s recall. He told me that Lennox will give me a brand new furnace for free, all I have to do is pay for installation. My concern is that he has a great incentive to replace my furnace because he will charge the labor for replacement, perhaps enough of an incentive to suggest replacing a furnace that doesn’t need replacement (considering the fact that this is not why I called him out in the first place). Has anyone else replaced their Lennox Pulse 21 via this heat exchanger recall program? If so, do you have any suggestions?

• Answer:Call 1-800 4 LENNOX with your model #, not necessarily your serial number, ask them if this is on the up and up. Also, you could call a Lennox dealer and ask them, you don’t have to tell them you are trying to catch another contractor in a lie, a lot people do not want to get into that. Just ask about recall on the Heat Ex.

Associated Pulse Furnace Question:lennox pulse 21 100,000 BTU conversion propane to natural gas?
We have two lenno pulse 21 furnaces (1989) placed into use in 1995, which we need to convert from propane to natural gas. Estimates for conversion have been 500 dollars per unit…Is this reasonable?

• Answer:No it is not resonable but given the age of the furnaces I am surprised the con. kits are still available. I would be more concerned about the high probability that the heat exchangers may well be broken. Your pulse furnaces are from a time when it was not good to own a pulse. Do a search on your furnaces, you will read some nightmare stories on these units. The Lennox web page used to come up completley red with warnings. Law suits, carbon monoxide are just a couple of the subjects associated with the older pulse furnace.

Associated Pulse Furnace Question:Lennox Pulse 21 Shuts Down?
I have a Lennox Pulse furnace. M/N G21Q4/5-100-3. The unit starts but does not continue running. The blower does not kick on when it calls for heat. Sometimes, however, everything works fine. I have replaced the controller and the gas flapper. I also have drained the water in the stand pipe. I now have determined if I leave the blower in the “on” position rather than the “auto” position, everything works fine. What is the solution to my problem?

• Answer:It sounds like it could be the fan timer control. That is the control that turns the fan on and off in the heating mode on that furnace. You may also want to check out the run capacitor and fan motor. For a step by step troubleshooting guide, check out my source.

Question

It sounds like a nice furnace. I’ve heard rumors about
them, but have not actually seen one yet. Hopefully
Rheem will have improved their heat exchanger design as well.
I’ve seen quite a few of them fail in relatively short periods of
time.
Does any know much about the new furnace that Rheem introduced or is
introducing this year that operates with a VSD and a modulating gas valve
for more uniform temp. ctrl.? I have only read about this and I am
interested if anyone has installed this furnace, what have your experiences
been (good or bad?), and approximately how much did this type of furnace
cost? I live in the Twin Cities, MN. and energy efficiency is important for
me on a furnace.

Answers
We haven’t had a single heat exchanger failure on a current Rheem
product.
In the past however…

The modulating furnace is neat. It has a board bigger than my Pentium
clone.
You need to use a special Enerstat thermostat that comes with the
furnace.
That special stat coupled with a supply sensor & return sensor are what
controls
the fire. The furnace can modulate between 40% and 100% of rated fire.
The
blower is adjusted to make sure the temp rise over the heat exchanger
stays
constant. The inducer runs on low at 40% and high above that. For
cooling
the furnace is like any other, except you have a few more speeds to
choose from
and the motor is extrememly efficient which effectively raises the SEER
level
about 1.5 points.

Associated Modulating Furnace Thermostat Question: error code on furnace?
I have a American Standard Freedom 95 modulating with acculink to which ACOT900 thermostat is linked to. Apparently randomly the acot900 red led turn on with error code 26 “error 26″ displayed on the panel. I was not able to figure out any pattern so far. I happens randomly when the heating program is on. I tried to run the furnace on forced heating but I was not able to reproduce the error. The error can occur 2-3 time per heating program. I also cleaned the filters to see if that made any different, it did not. At the same time, it means that I had shutdown power and restarted the system, it did not improve the situation. I found that this error 26 is an high limit error in the doc but high limit of what? what else can I check? I should probably add this detail as per the answer given. the furnace doesn’t stop when giving the error message. it just seems to blow stronger (not max) for maybe 30 sec and then goes back to the regular schedule and resume normal operations, like nothing happened. And it is never at the beginning of a program, target temperature is already reached.

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Question
I’m just curious if about 6 years is a good lifetime for an ignitor,
and if there is anything much I can do to lengthen this interval.
I did vacuum the cobwebs and dust out of the furnace at the start
of the season, and I was careful not to hit the ignitor with the
vacuum.

Answers
Matt- 6 years is damn good. Don’t be disappointed if you don’t get
that much life outta the new one…  They are noted for having the
same lifespan as a lightbulb, so, have a spare on hand at all times,
and put it somewhere safe where it cannot fall or become the latest
victim of raging children, etc.

Associated Lifespan Of A Furnace QuestionAssociated Lifespan Of A Furnace Question:: What is wrong with my furnace, and is it something that needs immediate help?
I use a 2-year-old, high-efficiency gas furnace to heat my home. A few days ago, I noticed that it was making a higher-pitched, rather sick sound as it started up. Then I noticed there was water dripping onto the top of it. From what I could tell, condensation in the exterior vent pipe was leaking through the joints in the pipe — I’ve sealed them, and the dripping has ceased. However, the “sick” sound is still there, albeit not as badly. Is this something that will simply shorten the lifespan of my furnace (more like 15 years than 20), or should I call a repair person sooner, rather than later? Or could this be something I might be able to fix myself? A motor problem, or whatnot. Thanks for your time in answering.

• Answer:It sounds like the venter motor is on it’s way out. There is two fans on a high efficiency furnace. One to circulate the air through your house and one to push the burnt gases outside through the plastic vent pipe. The vent motor might seem simple to change, but you are better off letting a professional handle it. It has to be installed properly with the correct type of sealers or you could have products of combustion entering your home. hire a pro, get it fixed right, and get a good nights sleep knowing you and your family are safe.

Associated Lifespan Of A Furnace Question: I seek to build deep-cycle batteries.?
I did a benefit/cost analysis of solar power and it is too expensive due to the lifespan of the storage batteries . I know about chargers that can extend the life of batteries but that is not enough. I seek good simple designs so I can make them myself. I have 370 lbs of lead and an electric furnace to melt in. I expect to be able to take the plates out individually if they need repaired. I further accept that the batteries will be much larger than a purchased battery at the same output capacity. I am willing to sacrifice structural toughness as the battery will not have to endure any kind of mechanical shocks or vibration. Some primary concerns: Making lead oxide, reusing lead oxide from other batteries, pressing the oxide into plates, avoiding contamination of self and home, and how much antimony to use. Thanks

• Answer:I’d reccomend against this, there are a myriad of dangers dealing with molten metal and especially lead. I’ve known people that work in battery factories (interstate) and they tell some ugly stories, it takes very little lead (and even less lead fumes) to do alot of damage. As far as creating your own alloys this is fairly foolish as well. The main killer for batteries is corrosion and failure of the lead plates. However careful you think you are you will never get the same quality and workmanship as a large manufacturer using modern tools and methods. Look into industrial deep cycle batteries, they have lives projected at 10-20 years with good practices, your PV panels are probably only going to work for 25 years so its a decent match. You can buy some serious batteries for a couple thousand, imagine your solar sells are going to set you back more than that If you are crazy enough to want to make your own then melt it in a very open area, wearing a respirator with the wind going at your back. You want the plates as thick and uniform as possible. You will never get a good pour by hand but if that is what you want, that’s the only way to do it. As far as re-using lead oxide I’m not sure you need to. Lead is pretty cheap, just buy some new lead. The old lead can be re-melted, its not going to all be PbO, just melt it and take the slag (oxide) floating on the top. I hope you don’t create a big environmental issue on yourself or your property, I’m sure you will spill and contaminate everything with the fumes.

Associated Lifespan Of A Furnace Question: What’s The Most Efficient & Economic Way To Use A Heatpump?I’m trying to figure out the operating dynamics of a heatpump with a programmable thermostat (Honeywell). Currently it’s programmed to keep the heat down at 50 degrees during the day, 66 degrees at dusk, and 60 degrees at bedtime. I don’t have the emergency heat setting selected either. This thermostat monitors temperature rise and will only turn on the emergency heating element if the temperature isn’t rising at some predetermined level. I’ve more used to a gas furnace with fairly instant heat and my quandary is basically this. Is cycling the temperature like I am okay or is it better to set the temperature up to something higher than 50 degrees as far as heatpump lifespan and economic usage? Yeah my heatpump does go through the defrost cycle thing when it gets very cold out. I have no furnace though.

• Answer:Your on the right track. The heat pump is not efficient when outside temps drop to 35 degrees. At that point the oil or gas furnace should take over for the heat pump. We have programmed our system similar to yours. The temps are a personal choice. We set our day and night temps a little higher. One point of interest, colder areas must have is a defrost cycle on the heat pump so the pump won’t freeze up and burn out the motor. Hope this helps.

Question
My 12 year old Keeprite furnace is heating the place OK but its cycling
without firing up intermittently. Sorry for the non-technical
description but here goes: when I listen to it fire up normally, I hear
a click followed by the flue fan (draft inducer) motor coming on and
then the gas ignition and heat. But recently, it has started doing all
of these without the gas ignition and heat. It sounds like its trying
to fire up but failing for soem reason. Anyone got any suggestions
before I call in a tech.

Answers
Bypass a draft pressure switch? TG, you are a fuckin idiot. Yeah it
might get him heat and it might also get him dead. The pressure switch
could be doing its job by letting you know that the furnace has a big
hole in the heat exchanger. Would you like me to tell you about the
one I found today with a hole in the secondary big enough to put my
fist in? It was running when I got there. Some idiot told him how to
jump the pressure switchWas it you? 1000 ppm in the flue. Was it you?

Associated Keeprite Furnace Question: Banging noises after Keeprite Propane Furnace shuts off, what is it?
After my furnace shuts off and for about 3\4 of an hour there is this clangy banging noice that happens every few seconds or so. Is this a problem with the heat exchanger or is it something else? I have just had the ventor motor replaced and the repair technician will not return my calls.

• Answer:Does it bang when the burner (flame) shuts off or when the blower (fan) shuts off? If it occurs when the flame stops (and the fan is still running), it should be checked by a technician SOON. The loud noises could indicate structural failure of the furnace or gas not fully combusting when it should. If this is the case, I wouldn’t run the furnace until it is checked. If it occurs when the fan shuts off, it could still be a structural problem and needs checked. However, it could be coming from your ducts. Galvanized ducts can weaken over the years. When the furnace runs, it can suck the duct inward and hold. When the fan shuts off, the duct could pop back. It can make quite a bang. Not an emergency, but a good HVAC installer could tell you what needs to be done. You will hear ticking in some furnaces that will be normal. The metals cool and contract at different speeds. Just like a car motor will tick after a highway drive. But there is a big difference in a ‘tick’ and a ‘bang’.

Associated Keeprite Furnace Question: I can’t find the pilot light on my older keeprite forced air furnace (model# hgf090). anyone know?
it’s a gas furnace and i need to find the pilot light to light it again as our furnace went out (don’t think it’s the fuse) . I’ve looked in the furnaces’ control panel and see the gas valve, etc, but for the life of me I (and someone else) can’t locate the pilot light. can someone describe where it is specifically?

• Answer:if you can find the control valve(on off pilot switch etc.) there is wires from thermostat, a heavey guage wrapped wire and aluminum tube leading out to the pilot.follow it, good luck. you can usually call your local gas co. and they will light it for free, watch them do it. remember they dont make money if youre not burning their gas.

Associated Keeprite Furnace Question: My Keeprite propane furnace sounds like it wants to start after it has turned off.?
My Keeprite propane furnace runs just fine and heats the house well, once it has hit the desired temperature, the heating shuts off and so does the fan. However, once the unit has shut down it then starts to make a sound like it is starting up again, then after 3-5 seconds it stops and then starts to sound like it is starting up again. This will continue until the house temperature drops to a temp where heat is needed again, at this point the furnace will then start up and heat the house again. Any help I can get to stop this from happening would be great.

• Answer:I dont know of your specific type of heating but my boiler does a similar thing.I have been assured by a corgi engineer that its just the pump kicking in and keeping the water circulating.

Associated Keeprite Furnace Question: keeprite versus goodman furnace?
Which furnace is more reliable?

• Answer: This Question has not been answered yet! Send us Your best keeprite furnace Answer!

Associated Keeprite Furnace Question: Anyone know which furnace brand is better? Carrier, Keeprite, or Goodman?
I’m looking for a good reliable furnace to install into my home. I originally had Carrier but it got damaged due to a burst water pipe. Should I replace it with another Carrier or go with a different company such as Keeprite or Goodman or some other? Which one is known to be good and reliable? Which one is the market leader? How do the other brands compare to the market leader? I forgot to mention that the house is around 3,600sq feet in case some furnace brands are better at certain square feet than others. What about other brands like Lennox, Trane, etc?

• Answer:If you plan to stay in the house, I would suggest investing in the Carrier. If you plan to sell the house and just need something to get by, then there is nothing wrong with the Goodman. I have installed and serviced both brands and both are reliable. Carrier is more expensive, and Goodman is more of a value brand. There are different product features available for both brands, so I would get some quotes from local contractors and have them help you decide which is best for you. I am not really familiar with Keeprite, but they are manufactured by a company called ICP, which also makes furnaces under other brand names that I have worked on. I am not a big fan of them though, but that’s just my opinion.

Associated Keeprite Furnace Question: Best high-efficiency furnace?
So here are my choices: York LX Series TM9V Keeprite VS95 Coleman Comforteer 9.S All are 95% efficiency. Keeprite has limited 10 year no hassle warranty (replacement of entire furance, including labour) and lifetime on heat exchanger. Coleman and York have limited 10 year parts and lifetime heat exchanger (same company). The difference between the Coleman or York and the Keeprite, after rebates, would be approximately 1700 CDN (Keeprite being cheaper). I know there are lots of other great furnaces around, but these are my final choices, for various reasons. If cost didn’t matter, I’d get an Amana. Nevertheless, could someone who knows suggest the best of these 3? Thanks!

• Answer:You are right about being a LOT of good products out there. There are very few junk furnaces anymore due to competition. A couple of other good ones are the Amana you mentioned, Goodman. Carrier, Trane, and Lennox. From the three you list I would choose the York for no more than their reputation. However if I were you the first thing I would do is check the reputation of the dealer in your area and buy the one who seems to give the best service. Check with the BBB in your area. I purchased a new 93+ furnace 4 years ago and it will now have paid for itself during this winters season in the savings on gas. My gas company came to the house to check why I was using so much less gas. They thought I might have bought a wood burner.

Associated Keeprite Furnace Question: Central Air continuously Runs.?
Hi, I have a 1.5 ton keeprite central air conditioner that runs steady. My house is 900 square feet and the furnace blower 1/3 hp. I have 2 ducts running off the furnace one six by eight inch duct with 4 six inch supply ducts running off it. The furnace also has another eight by eight inch duct with 8 six inch supply ducts running off it. The house has 2 large centrally located return air ducts that are oviously big enough. I replace my filter every month along with closing all the windows and blinds in the house along with keeping all vents in the house un blocked and open except for the basement vents. The outdoor and indoor coils along with the ducts have all been cleaned. We also had the refridgent checked in the ac and we were told that was fine. There is only a 10 degrees celsius differance between the supply and return air ducting. An example of it running steady is when it was 15 celsius outside and the thermostat which is brand new was set at 21.5 celcius and the indoor temp My thermostat isn’t located on an outside wall Any holes in our ductwork have been sealed all temps are in celsius

• Answer:You should have about 17 to 19 degrees F difference between the return and the supply as measured at the furnace. I used the standard conversion formula for C to F and could not make heads or tails out of the temps you gave in C. Are you sure that the compressor is running steadily? Just because the outside unit fan is running does not mean that the compressor is. Are you sure it is compressing 100%? I do not know what refrigerant you are using but standard in the States is R-22 or the newest one R-22a (don’t quote me on the newest). We will assume it is R-22. In order to have a 40 degree F evaporator you would have to show 69 psig on a gauge. Hope this is of some help to you.

Question
This is embarassing. I’ve got through one set of double doors, out of the
large chamber (by throwing the switch upstairs), and now there’s another
set
of double doors just around the corner! I can’t see how to get these open.
Help!

Steve

PS What is the point of these gold cages? Are they decorative or
functional?
Am I missing something?
Answers
There is a small switch just to the right of the double doors.
Partial walkthrough of Furnace of the Gods is up at

http://tombraiders.com/tr2gold/FurnaceGods/Walkthrough.htm

Associated Gold Furnace Question:how do I build a propane furnace to melt gold?
I need to melt down concentrates to get the gold out of them.

• Answer:If you’re handy with tools, this is a fun project. It can release a whole bunch of creativity. The link below has plans for a backyard foundry, totally homemade. Have fun and be safe!

Associated Gold Furnace Question:Is gold made during the blast furnace production of steel?

• Answer:No, the production produces steel, slag, and waste gases. The slag may contain gold as an impurity, but gold itself is not produced. I know that during the purification of copper, anode sludge frequently contains gold and platinum. But even these have to be separated first.

Associated Gold Furnace Question:Spiritually Thinking: “The fining pot is for silver, and the furnace for gold: but the Lord trieth the hearts.?
The daily irritations of life, the things that annoy so much: what are their meaning? Why are they permitted?

• Answer:I know, I ask the same thing sometimes. (It is like a piece of coal being refined into a Diamond too.)

Associated Gold Furnace Question:Is it legal to pour gold bars and sell them.?
I see articles on the internet on how to do it and i even bought a gold furnace but looking around all i see is big companies selling them with their logo on them. Even on ebay i don’t see any that even look like they could have been made in someones backyard.

• Answer:Yeah, they’re of unproven content- that’s the reason we pay more for Krugerrands, etc, its’ a known, guaranteed quantity. You could cast them with a led center like a twinky bar, for all that we know, with any weight differential occupied by air space.

Associated Gold Furnace Question:Where can i buy a gas furnace/electric melting pot for melting gold for under £200?
tried making my own blast furance but no joy

• Answer:Pure gold melts at1063C and it’s main alloys with copper melt at between that temperature and 880C at 81% Au.No alloy would need more than 1083C.So all you need is a vitreous silica crucible wound with Ni chrome(bright ray)wire and coated with alumina cement which you then insulate by boxing it in a fireBrickk box filled with alumina powder.You could also avoid the electrics by putting your crucible into a homemade muffle furnace made out of firebrick which you could heat with charcoal,coke or a gas oxygen flameMademade dozens of such things and you could do something along these lines today.Generally purification should only need that the crucible atmosphere is oxidising.Good luck and go to it!Contact for further if needed.

Associated Gold Furnace Question:Would a burning car be hot enough to melt/deform gold?
I know that it takes a really high temperature to melt gold, usually necessitating a furnace. …But would the trunk of a burning car suffice? If a gold ring was left inside the trunk of a burning car, would it melt? Would it at least show any telltale signs like blackening or deformities? Thanks.

• Answer:Gold has a melting point of about 1064 degrees C. Even a candle flame can get hotter than that. Gold exposed to the flame would certainly melt. Gold more protected might not.

Associated Gold Furnace Question:how to refine gold,how hot do i have to get it?,how do i heat it?what kind of furnace do i use?

• Answer: This Question has not been answered yet! Send us Your best gold furnace Answer!

Associated Gold Furnace Question:how to smelt gold nuggets or jewelry into gold bars without a furnace (with chemicals or something similar)?

• Answer:Nope, sorry, you’ve got to generate heat. The best source of chemical heat is oxidative combustion (i.e., a furnace). w

Associated Gold Furnace Question:How can i seperate gold/silver jewelry that is melted together?
My sisters house burned and all her jewelry, which was in a drawer basically melted into one glob. If i melt it (her late husband left a glass furnace) and let it cool gradually, will the gold sink to the bottom? Also,what happened to the diamonds. are they retrievable? thanks

• Answer:seperate gold and silver after they are melted together: you could not do it by yourself. you’d better send it to a jeweler and ask them to do it for you. they will do it for you on a certain charge. diamonds: i do not think it is a problem if the diamonds stick the the mixed metal of gold & silver. you will get the diamonds back after they remelt the mixture. how to seperate the mixture of gold & silver : as far as i know they do not melt the mixture of gold & silver to refine the gold: they use kind of acid the seperate the gold and silver, meanwhile, the diamonds will come out safely. maybe, your diamonds is ” burned”( looks like cloudy ) since the gold is burned. you can ask some diamond re-cut factory or, the jeweler knows how do deal with it. of course, ask them how much does it cost first, then you can take decision which is better. i m diamond jewelery manfucturer from china. u r welcome to contact me if u need any help about jewelery.

Associated Gold Furnace Question:how is the best way to melt gold plated items cpu cards plated fingers etc. to seperate the gold from metal?
I have a propane furnace. and I need to know how to seperate the gold from the plated matael , computer gold plated fingers cpu cards etc.. help..

• Answer:There’s a lot of useful info on this site: http://www.finishing.com/188/89.shtml You’ll soon see what you can do and what you can’t. Whatever process you decide on, it will have to be very economic: Quote: “One ton (2000 lbs) of “average” circuit board from modern computers and electronics generally yields (in a very good system) between 8 and 11 troy ounces of 24k gold.”