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-   -   Concord 80 gas turns off after glow (https://www.askmehelpdesk.com/showthread.php?t=283711)

  • Nov 21, 2008, 04:51 PM
    gecu1999
    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?
  • Nov 21, 2008, 04:55 PM
    hvac1000
    1 Attachment(s)
    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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