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Old 11-03-2019, 04:00 AM   #7
WaltBennett
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Join Date: Mar 2013
Location: Hanover
Posts: 1,471
M.O.C. #13325
Welcome to the world of cold weather RVing! Sounds like you're experiencing the famous 'set back' problem. All thermostats have this feature where they don't cut on until their a certain number of degrees below where they're set, but cut off at what you set them for. Problem is that our wonderful propane heaters will keep running even when told to stop. They do so in order to cool down the heated exchanger - supposedly not doing this will cause a fire. That means you keep getting more heat pumped into your living space and in an RV, this means another number of degrees heat above where you set the thermostat. This, on top of how heat rises and what's commonly the bedroom gets quite warm.


We typically set our thermostat for 66 to 68 and run one or more catalytic heaters. That way if it gets really cold, the furnace will kick in. This doesn't help keeping the underbelly and basement above freezing though unless you do some careful juggling.
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