Originally Posted by BuddyK
so does the outside switch stay on when using propane?
If you are hooked up to a form of 120 volt shore power, and JUST want to run the heater off of propane, then you must turn off the outside switch to the electric heating element.
If you are not hooked up to a form of 120 volt shore power, then the electric heating element won't work anyway....so it won't matter if the outside switch is turned off or on. However, this can be a bad habit to get into, as you may forget the switch is on, and drain the water heater. With no water in the heater, and the electric switch in the on position, then the next time you do hook up to shore power......poof, you will burn up the electric heating element. For this reason, it's a good idea to turn off the outside switch, even if you are not hooked up to shore power.