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Atwood Hydro flame 8500-IV Tim 11-19-13  
I have a 2010 Montana fith wheel. The heater blower will come on but does not ignite. After about 10-15 seconds, the blower goes off. I checked propane, no problem. Stove lites without issue. Any suggestions on the reason the heater furnace is not igniting? Heater has been working fine for past month up until last night.
Re: Atwood Hydro flame 8500-IV BUBBA THE BUS TECH 11-19-13  
In order of recomended checks:

AC control box bad? Test by hot wiring furnace behind t-stat. Common on Dometic Brisk air recently.

Is the furnace motor noisy, Expected life of motor in cold climates is 1 year. If it does not trigger the sail switch due to running slow this will happen.

Bad limit switch

Bad sail switch

Board. Unfortunately this is the second most likely problem after the AC control box. Your local RV store can test this at the counter for you. Usually @ no charge.
Re: Atwood Hydro flame 8500-IV Richard 11-26-13  
Hi, I have a 8500-lV series furnace in my 2011 open range trailer. can this or any rv furnace be converted to natural gas and if so, how?
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