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    pman21's Avatar
    pman21 Posts: 8, Reputation: 1
    New Member
    		  
    #1

    Dec 3, 2009, 10:53 PM
    Goodman a/c unit gmt070-4 gas value kept cutting off
    GOODMAN A/C UNIT GMT070-4 GAS VALUE KEPT CUTTING OFF runs about 15-20 sec. then shut off. What is the problem...
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 3, 2009, 11:19 PM
    Try cleaning the flame sensor. That is a little longer than usual for a flame sensor cleaning BUT it is the cheapest first thing to try. After or before cleaning you can also test the flame sensor circuit (see attached)
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    2. hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Dec 3, 2009, 11:29 PM
    Here is a complete service manual for your furnace and a few others combined. Just make sure to the service info for your model number.

    http://www.hvacpartsshop.com/Gmpe075-3%20Series.pdf
    pman21's Avatar
    pman21 Posts: 8, Reputation: 1
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    #4

    Dec 4, 2009, 12:44 AM

    Thank you veeeeeeeeery much!! That was the problem. God bless you.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
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    #5

    Dec 4, 2009, 08:41 AM
    Glad you got it running.
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