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    long38's Avatar
    long38 Posts: 4, Reputation: 1
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    #1

    Oct 16, 2011, 11:09 AM
    Troubleshooting goodman furnace gmh80703ana?
    When I turn the furnace on the fan comes on. After a few seconds the ignitor starts glowing but the burner does not light. After 3 tries it then locks out with a lock out code.
    JonesHVAC's Avatar
    JonesHVAC Posts: 173, Reputation: 12
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    #2

    Oct 16, 2011, 11:25 AM
    Gas valve isn't opening up. Could be a bad transformer... you will need a multimeter and the know how to use it in order to solve your problem. If you can do this we should be able to talk you through it...
    long38's Avatar
    long38 Posts: 4, Reputation: 1
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    #3

    Oct 16, 2011, 11:47 AM
    I do have one and I have 120 volts between the black wire and white common. 24 volts between the red and blue
    JonesHVAC's Avatar
    JonesHVAC Posts: 173, Reputation: 12
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    #4

    Oct 16, 2011, 11:52 AM
    Ok, after the ignitor glows you should be able to hear the gas valve open and you should get 24-28v to the valve as well. Check this and let me know, thank you
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