I always tow with my 'fridge on propane (AUTO).
I do not tow with the water heater or furnace on, because I don't need too. Can't see any reason to heat my 5er while it is going down the road. Water heater probably would not stay lit, but I don't know, because I usually use electric for the water heater.
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John & Peggy
1SG US Army Retired
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