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    jwang1's Avatar
    jwang1 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Nov 22, 2006, 03:34 PM
    Goodman Furnace won't keep fire up
    I have a Goodman GMP100-5, age uncertain, maybe 6 years. The burner fired up for 7 seconds or so and turned off. After 3 cycles it went off. The status light blinked once. Since the gas fired OK. I replaced the flame sensor. It still does the same thing after the flame sensor replacement. It is a 80% efficiency, forced draft and pilotless unit. A few days ago, the blower fan did come on a few times on its own, with the thermostat turned off. Is it an indication that the control board or the thermostat may be bad? A couple of months ago, when it was in cooling mode, the condensing unit would turn on for a while but would not keep running. I cleaned the thermostat and it worked OK. Suggestions anyone? Thanks a lot.
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
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    #2

    Nov 23, 2006, 10:21 AM
    If checking the flame sensor connections to the board doesn't help, I am afraid the board is bad. I hate to see you cough up for a new one and it not be the problem.
    jwang1's Avatar
    jwang1 Posts: 2, Reputation: 1
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    #3

    Nov 23, 2006, 11:48 AM
    Thanks labman. I did check the connection. I guess I have to bite the bullet then.
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