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I'm helping a nieghbor out with a furnace problem. He has a Goodman GMPN100-4 that lights for five seconds or so then goes out. We cleaned the flame sensor and checked all connections for corrosion. This didn't help so we replaced the flame sensor with a new one and still no luck. Should we replace the control board or is there something else causing this problem?

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  • smarek452 Oct 14, 2010

    Thanks, we will replace the board and let you know if that works.



    Steve

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The furnace goes out because it can't detect the flame and shuts down for safety. If the sensor itself is good (and it is since you just installed a new one) then the only thing left is the board itself, it can't react to the signal from the sensor.
Yes, the only thing you can do is to replace it.

Posted on Oct 14, 2010

  • Azrael SRL Oct 14, 2010

    And make sure that the wires themselves aren't shorted/disconnected.

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