I have two switches with a red light on them when the switch is on. One as Chuck pointed out is to turn on the electricity for the water heater. Choice up to you whether you want propane heated or electric. The other switch on my coach is on the bed box and that is for the block heater which I use when the weather is real cold.
Hope that helps!
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2002 Gulf Stream Scenic Cruiser
2018 Buick Envision Essence
Neway Freightliner chassis
Aventa II Blue Ox
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