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    lukeg1's Avatar
    lukeg1 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Sep 22, 2009, 08:26 PM
    Furnace will not ignite
    I have a goodman furnace modle# gupi100-4 the problem that I am having is when you turn the furnace on the induce draft motor come on the ignition comes on for a couple seconds and goes off and it keeps going on and off and never lights the furnace.I have replaced the draft motor,pressure switch and limit switch.It worked for a day and started doing the came thing
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Sep 22, 2009, 08:52 PM
    Try cleaning the flame sensor well with sand paper or steel wool.
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    dac122's Avatar
    dac122 Posts: 463, Reputation: 17
    Full Member
    		  
    #3

    Sep 23, 2009, 06:22 AM

    Couldn't hurt to verify you have no blockages in your intake or exhaust. Do you have power to the gas valve to actuate?
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