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Lennox 80 ugh turns on and shuts off in 2-3 seconds

The unit comes on for about 2-3 seconds and the ignitor pin is bright orange. I tried it several times and it did the same thing. The gas ignites but then goes out. Any Ideas????

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  • bcpdduke Nov 25, 2008

    I cleaned the sensor off and it still did it, so I cleaned and repositioned the flame sensor and it started to work. I dont know if that fixed it but a turned everything back on and it worked.





    Thanks for all the help.

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You may need to clean the flame sensor, esp. if the gas is coming on.

Posted on Nov 24, 2008

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