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    darrin1w's Avatar
    darrin1w Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Nov 6, 2007, 02:11 PM
    Furnace not working
    I have a Goodman GMP100-4.

    It does not ignite. I have followed the written instructions and cleaned any debris arount the unit. Suggestions?
    XenoSapien's Avatar
    XenoSapien Posts: 627, Reputation: 42
    Senior Member
    		  
    #2

    Nov 6, 2007, 05:24 PM
    Does it have a spark-box? Does the fan come on?

    XenoSapien
    darrin1w's Avatar
    darrin1w Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Nov 7, 2007, 10:25 AM
    It has a box. The fan does come on, then the light on the board flashes three times and the fan shuts off.
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
    Uber Member
    		  
    #4

    Nov 7, 2007, 02:17 PM
    Go to https://www.askmehelpdesk.com/heatin...ons-58313.html

    Do you have a decal that lists 3 flashes, or flash, pause, flash, flash (12) as pressure switch open? Check and clean the hose from the pressure switch. Suck on it and see if the switch clicks.
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