![]() ![]() As you probably noticed I mentioned sail switch, and they immediately replied that it’s possible. Ordered new limit switch (Atwood 37022 Hydro Flame Limit Switch 190 Degrees, around $15 with shipping) paying attention to get one with correct limit temperature and also trying to find out with RV manufacturer (for no reason I decided to contact them, not Atwood) whether it’s possible to take sail switch out without taking the furnace unit out. It won’t stop/start to keep up with temp setting. Then turn both off when I don’t need heat anymore. So from now on I had to turn thermostat on and start furnace using its “tech switch”, which is a jumper cable. To make sure I threw jump cable with +12V to the white wire on the control board, which did the trick, but also made thermostat glitchy. After reading numerous articles/forums/manuals I started troubleshooting and found out that limit switch (don’t confuse it with sail switch) is not working, therefore blocking furnace from firing up. So, at some point (of course that was a coldest part of our trip in Yellowstone) furnace (Atwood 8535-III) started blowing cold air only. ![]()
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