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Comfortmaker furnace fires sometimes

Cycles 2 or 3x and then valve will not open (new glow plug is installed)

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  • richglenn Jan 07, 2009

    I believe it may have been a build up of dust on the mercury switch on the T stat...but It did fail to light one time after that with a red light blinking on the module. I think it was 3 blinks. I also hear a strange click from solenoid on valve but it opens and shuts down properly (noisy though). T stat is new and glow plug.

  • richglenn Jan 08, 2009

    Cycles fine for half a dozen times and then codes to red solid light no blinking. Then you half to lower the T stat all the way down and back up to desired temp. Light goes out when you lower the Tstat and then it fires up when you raise it back up.

  • Danny Clark
    Danny Clark May 11, 2010

    Is the ignitor glowing? Any fans coming on? any ignition? what exactly is it doing/not doing and in what order?



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Is there any led lights inside the fan cabinet that blink a code if so write down the code then check inside the panel it might tell you the code description if so let me know what the description is and we can procede

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