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My GOODMAN furnace GMH80703ANAA Starts but quits 5 seconds later

My furnace is only 2 years old. It worked fine untill 2 days ago. Now it tries to start, the ignitor glows to a orange color,then the gas comes on for about 2 seconds and burns then everything stops except the fan and the whole cycle starts again. It will cycle several times like this and then stop for a while and start the prosses over.
Thank you for any help I can get, it's Sunday and cold here in Minnesota.

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You have a flame sensor that may just need cleaning take out and take fine sand paper or emery cloth and clean

Posted on Nov 30, 2008

  • 1 more comment 
  • wfk1212 Oct 04, 2010

    dwk guru - you da man... I had the same issue and took some cheese cloth, wiped it down and fired it up. Seems to have done the trick. Thank you very much, Truly.

  • mito0 Jan 23, 2011

    great advice, dwkcool!
    a light sanding on the sensor did the trick.
    for those unfamiliar with this part, it looks like a long spark plug hanging down behind the burner on the far left.
    it's held in with a single screw.
    this took 2 minutes and saved me plenty of money on a wasted service call.
    thanks!

  • tdietz09
    tdietz09 Nov 25, 2012

    Worked for me as well. Thanks for the advice.

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