Originally Posted by kevinmiles
Both my 2009 Jayco Designer and my 2012 Infinity have switches in both places - ie. they both have to be 'on' for the electric heating element to work.
When I was drying out the floor under the fridge (thanks to the great bypass connections that weren't tightened), I found the receptacle the water heater is plugged into.
Before I put everything back together I put in a switch with pilot light. Now I don't have to open the access panel every time I want to use 120V to heat the water. I leave the tank switch on and control the AC power with the switch inside.
I don't understand the reasoning behind have the 120V switch on the tank, other than it's a short cut for the manufacturers.
It's not a big deal to switch a receptacle, most of my lamps in the house are controlled by a wall switch, seems reasonable that the hot water AC could be controlled the same way.
There is a switch kit available as an after market upgrade, the cost is about 3 times what it costs to buy the parts from on of the big box building supply stores.