Trouble shooting GMP Furnace

steve wilmoth · #1 Nov 23, 2007, 11:01 AM

I have a gmp075-4 gas fired furnace, I just replaced the gas valve and the thing starts up fine but when the burner fires and the hot bar goes out the burner goes out any ideas? limit switch maybe ?

acetc · Nov 23, 2007, 11:12 AM

You may have a faulty flame sensor, try sanding it lightly with sand paper. This sensor is a rod sticking into the flame and will have one wire coming from it. Mike



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