What do you know, another furnace issue.
This was the last straw for me and I needed to figure this one out.
Symptoms:
- Fan runs (purging combustion chamber)
- Gas valve opens
- Igniter clicking
- Lights and then extinguishes
- Attempts to relight two additional times
- Ignition Lockout error
So, what I tried:
- verified propane flow, no change
- replaced copper line as it had kinks in it that could restrict propane volume, no change
- replace the electrode, no change
- verify electrode gap between prongs and burner head, no change
- replace high tension wire, no change
- removed entire furnace and cleaned all components and chambers, no change
- verified sail switch and limit switch functioning, both working (gas valve was opening)
I was getting frustrated until I started playing with the ignition module board. The spark was intermittent at times and when it did light, the flame would go out before attempting to relight. When touching the coil for the electrode, it seemed as though there was a loose connection possibly as when pushed on, the result would be potentially no spark or good spark.
I ordered a new ignition module board, installed it and voila! furnace worked without skipping a beat. I went out camping last weekend and it was cool at night, I had the furnace set to temp and through the whole night it ran as expected. Happy to finally have a consistent working furnace again.
I must say I am happy that I have cleaned the furnace parts, It was pretty nasty with hair, dust and bugs.