Can't figure out Atwood furnace no ignition
Make and model: Atwood Hydroflame 8525-IV
Complaint: Furnace clicks but fails to ignite, then goes into lockout mode after three attempts. Control board has green light, turns to red during ignition attempt and then back to green after failure, then no light when in lockout.
Parts cannon so far:
Interventions/checks so far:
Any ideas as to what to check next?
Complaint: Furnace clicks but fails to ignite, then goes into lockout mode after three attempts. Control board has green light, turns to red during ignition attempt and then back to green after failure, then no light when in lockout.
Parts cannon so far:
- New control board (Dinosaur)
- New ignitor/flame sensor unit (OEM, with new high-voltage cable)
- New propane regulator
Interventions/checks so far:
- Battery voltage at ~12.7v, and furnace will not light on shore or generator power either.
- Removed and probed sail switch and found continuity between contacts when sail was depressed by hand (multimeter in continuity mode gave steady beep). Brushed sail switch contacts with wire brush and pencil eraser and reinstalled. No change.
- Blew out propane line with compressed air, propane tank is full, water heater is currently running on propane and stove has been used repeatedly; note that problem still occurs if water heater is off. Fridge is also running on propane without a hitch. I smell slight propane smell at furnace exhaust when it tries to ignite.
- Removed and cleaned burner chamber thing; minor rust and deterioration.
Any ideas as to what to check next?
