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    neilsen's Avatar
    neilsen Posts: 4, Reputation: 1
    New Member
    		  
    #1

    Nov 25, 2007, 10:56 AM
    Gas furnace burner won't ignite
    I have a 26 year old Friedrich gas furnace model GHA075NDC that the burner will not ignite. The pilot is lit and I can turn the fan on, but the burner will not ignite. Can anyone help me solve this problem?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Nov 25, 2007, 01:55 PM
    Is the gas valve in the furnace turned to ON.
    neilsen's Avatar
    neilsen Posts: 4, Reputation: 1
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    #3

    Nov 26, 2007, 10:35 AM
    Yes
    rtw_travel's Avatar
    rtw_travel Posts: 347, Reputation: 36
    Full Member
    		  
    #4

    Nov 26, 2007, 11:15 AM
    When you say you can turn the fan on, do you mean you can turn it on manually?

    First things first - we should figure out if this is a thermostat problem or furnace problem. Can you jumper together the two wires connected to the thermostat that control the furnace? If the furnace starts, then it is a thermostat problem.
    neilsen's Avatar
    neilsen Posts: 4, Reputation: 1
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    #5

    Nov 27, 2007, 07:58 PM
    I connected the red and white wires and nothing happened.
    labman's Avatar
    labman Posts: 10,580, Reputation: 551
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    #6

    Nov 27, 2007, 09:53 PM
    If that applies 24 volts across the gas valve terminals and it doesn't open, it is bad.
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