Not sure that’s correct. I have the Coleman Mach unit, and might be wrong but I don’t think it switches automatically to gas. Been several months since I used RV but my memory is the heat pump just stops working and I notice rig getting colder, at which point I switch to gas, but try it and see what happens. Make sure propane tank is open of course or no furnace.
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Neil & Gail
2022 F350 DRW
2022 Montana 3231, Legacy, Cobalt FBP, 1,200-i-L solar
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