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 ignitio...
Forum Discussion
Alrighty, did some more work, no joy so far:
The spark really did look better after I separated the prongs a bit (being careful not to bend the ceramic one, just the other one). I thought that might have been it, so I put it back together a little prematurely.
I might go back in to vacuum out the pipes and check the combustion chamber again, but nothing looked amiss. Will also re-check the propane hole.
- Removed burner/valve/etc. assembly and observed spark electrode. In shaded daylight, couldn't see spark when I heard spark click. Separated electrode tips until they were about 3/16" apart. Thereafter observed strong blue spark at the very tip of the electrodes.
- Checked voltage at end of wire that goes to propane valve, used nearby screw for ground. Observed ~10.9 volts. OK?
- Checked continuity of each coil; multimeter read 41 on both coils in continuity mode.
- Reconnected propane, turned on propane at tank (I only have one tank), ran stove and turned on fridge with no issues and with strong flow. Turned thermostat to 90, turned on heat, still trying to ignite and not igniting (repeated sparking for a few seconds, then nothing, then two more tries before hitting lockout). Cycled through to lockout 4 times and no change.
The spark really did look better after I separated the prongs a bit (being careful not to bend the ceramic one, just the other one). I thought that might have been it, so I put it back together a little prematurely.
I might go back in to vacuum out the pipes and check the combustion chamber again, but nothing looked amiss. Will also re-check the propane hole.
