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york 80 furnace mod. # p4hua12n06401a ser. # wemm01044


igniter comes on, gas ignites and goes out in 6 seconds.  red light on board comes on and goes out.   then that cycle reapeats. need help. thanks

Make sure all burners are lit for the short duration.
Pay special attention to the burner at the flame sensor.
Clean the flame sensor probe.
A dirty sensor probe can cause this issue.
It may not look dirty.
A few swipes with fine sandpaper should do it.


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