Question

I put in a 150k btu comfortmaker furnace last year for a friend.  Now the

furnace is shutting down on startup.  The Furnace uses a White Rodgers  model #

50A50-112 control module which provides an LED that “blinks” trouble codes.

The problem is it “blinks” six times and there are only trouble codes for

“blinks” of 1 to 5.  The module uses a “flame sensor that appears to be just a

piece of wire in the flame ( I assume it uses a plasma effect to detect the

flame).  Has anybody else had a similar problem?  Please E-mail at

if you have any ideas.

Answers

I saw this once before where there was no code for a 6 flash, it may be

something to do with neutral and hot mixed up where power comes into

control compartment or mixed up in conduit. Check and make sure neutral

is actually eventually connected to the neutral bar at your load center.

You may want to make sure that the furnace is grounded well.

I do know I had to call comfortmaker to help figure out what was

happening.

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• Well, first stage supply temps on the 2 stage furnaces are lower than first stage of the standard forced air system. The btu output is about 30 percent lower or so on the 2 stagers supply, I’m guessing, 110 degree air instead of the standard’s 140 degree air. So, your colder room is getting lower temperature supplied to it. These kinds of furnaces perform the best in new construction or in condos where the insulation is even. I see them in those homes in gated communities and they are fine. But, the traditional furnaces that blast out the heat, i think, are still the best for the older homes. So what can you do about it ? You can’t go back, so you could insulate that run of duct to that cold room or the walls in it. That’s the only thing I can think of to make it warmer.

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