duo therm furnace won't stay lit
I replaced blower motor in my furnace in my '87 Avion, since then the burner comes on and then goes out. It appears to be an issue with the air blowing back and causing the problem. I can remove the...
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That sound like you are cycling on the high limit switch.....
Runs fine on bench but on/off when installed...air blowing back
You need to make sure combustion/exhaust chamber is free, clean & clear of any obstructions. Overheating in combustion chamber due to inadequate air flow thru it and high limit switch opens shutting down burner.
High limit switch is in same circuit as sail switch....so when you jumpered the sail switch the high limit switch was still in the circuit going to control board
Runs fine on bench but on/off when installed...air blowing back
You need to make sure combustion/exhaust chamber is free, clean & clear of any obstructions. Overheating in combustion chamber due to inadequate air flow thru it and high limit switch opens shutting down burner.
High limit switch is in same circuit as sail switch....so when you jumpered the sail switch the high limit switch was still in the circuit going to control board
