One complete side of your hot water heater tank is exposed to the outside elements (weather) and will allow the water in the tank to freeze if it gets cold enough. You should either drain the hot water heater or leave it turned on to prevent freezing.
As for the electric switch, there are two or possibly three. First, there is the circuit breaker in the control panel/converter box. Second, there is a switch to turn on the element hidden behind the propane igniter circuitry in the lower left hand corner of the outside panel on your hot water heater. If you open the outside "swing down" panel, stoop down so you are eye level with the bottom of the opening, you'll see a black switch on the metal wall, just behind the orange and black rubber igniter. That is the electric heating element switch. It is clearly marked off (on top) and on (on bottom) which is opposite normal electric switches. Don't ask why, nobody has yet to give me a logical answer, so just accept that the switch is mounted "backerds"... The third may or may not be in your water heater system. It is a wall mounted electric contol switch very similar to the propane switch that is inside your RV. You may or nay not have that electric switch, some RV's do and some don't. The main control switch is the one outside on the water heater, the "backup" is the circuit breaker.
I'd leave the hot water heater on during cold weather when there is a potential to freeze.
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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