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    gecu1999's Avatar
    gecu1999 Posts: 1, Reputation: 1
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    #1

    Nov 21, 2008, 04:51 PM
    Concord 80 gas turns off after glow
    I have a concord 80 plus gas furnace. I turn on the temperature control to say 75 and the system starts. Sounds the fan or blower is on, then the glow spark then I can see the gas flames turn on but they only last about 4 or 5 seconds. Then the cycle starts again. Shouldn't the gas flames turn on for minutes and not 5 seconds?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Nov 21, 2008, 04:55 PM
    Quote Originally Posted by gecu1999 View Post
    I have a concord 80 plus gas furnance. I turn on the temperature control to say 75 and the system starts. sounds the the fan or blower is on, then the glow spark then i can see the gas flames turn on but they only last about 4 or 5 seconds. Then the cycle starts again. Shouldn't the gas flames turn on for minutes and not 5 seconds?

    Clean the flame sensor with sandpaper.
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