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Old 05-03-2017, 09:43 AM   #1
Rivet Master
Al and Missy's Avatar

2002 30' Classic S/O
Melbourne Beach , Florida
Join Date: Nov 2013
Posts: 4,149
Hydro-Flame 8535-IV won't light

I tried to use the furnace one morning while we were out for the last two weeks and it wouldn't light. Symptoms are:
1. Fan runs
2. Gas valve opens, I can hear the click and smell gas in the exhaust.
3. Furnace doesn't light, fan continues to run, gas turns off.

I reset it and tried several times, no difference.

I pulled the igniter wire at the control board and tried again after re-start. There was no apparent spark from the coil to the igniter wire.

My conclusion is that the sail switch is good since the gas valve is turning on. The only thing I can see that would cause spark to fail once the gas valve is open is the control board.

Any other suggestions before I order one?


“You cannot reason someone out of a position they have not been reasoned into"
Al, K5TAN and Missy, N4RGO WBCCI 1322
2002 Classic 30 Slideout -S/OS #004
2013 Dodge 2500 Laramie 4x4 Megacab Cummins
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