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    Tryingtobehandy's Avatar
    Tryingtobehandy Posts: 4, Reputation: 1
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    #1

    Jan 18, 2009, 09:00 AM
    Gas coming on, but blower motor only running short cycles
    I can see the burner igniting and the gas burning. Then a few seconds later the blower kicks in but kicks out shortly after coming on. Switched thermistat to on position and blower does the same thing instead of coming on running continuously? Unit just will not run long enough to heat the house. It is a comfortmaker furnis. Could this be a relay for the motor or one of the limit switches acting up. Any info on what to check would be very helpful, thanks
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Jan 18, 2009, 10:16 AM
    Sounds like the fan control is defective allowing the blower not enough run time.
    Tryingtobehandy's Avatar
    Tryingtobehandy Posts: 4, Reputation: 1
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    #3

    Jan 18, 2009, 10:59 AM
    How do I check the fan control?
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #4

    Jan 18, 2009, 11:05 AM
    Does the fan motor feel hot? Careful, don't burn your fingers. If not, you will need a voltmeter to diagnose the problem.
    Tryingtobehandy's Avatar
    Tryingtobehandy Posts: 4, Reputation: 1
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    #5

    Jan 18, 2009, 11:16 AM
    I have a voltmeter I am just not sure what to check that would be controlling the motor, the motor does not stay running long enough to really get hot
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
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    #6

    Jan 18, 2009, 11:30 AM
    Give us the brand and model # of the unit.
    Tryingtobehandy's Avatar
    Tryingtobehandy Posts: 4, Reputation: 1
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    #7

    Jan 18, 2009, 06:17 PM
    The name is Comfortmaker on the outside panel. The name on the inside of the unit is Snyder General. Model # GUG070A012N and serial # R900800203. I found a filter that was sucked into the return that was cuasing part of the cycling problem. It runs in he on position now but does not work in the auto position on the stat.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #8

    Jan 18, 2009, 06:39 PM
    That is a ICP brand furnace.

    This should be the part you need.
    I would not buy the part there you can probably find it cheaper. This is just to give you a idea of what the part looks like. It is adjustable for a longer run time.

    11" Fan & Limit Switch Honeywell (3 or 4 wire switch): Nationwide HVAC Parts
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