Trouble shooting rear furnace
I not getting any heat out of my rear furnace. It's blowing cold air. I check and propane is making it there.
Forum Discussion
- Do you hear it sparking? If yes, check continuity on the two gas valve coils?
Check output of the circuit board for 12 volts.
Check for 12 volts DC to circuit board.
Are you operating on battery or shore power. Low battery could indicate sail switch not closing so no power to circuit board. - Moved to Tech Issues forum from DIY.
- Fan runs but Sail Switch MUST close before anything else can occur.
DC has to go thru sail switch/limit switch and back to circuit board before circuit board can send DC to as valve/spark electrode
Sail switch......
