Originally Posted by litgrep
I could be wrong be I thought the switch on the monitor panel was for the propane ignition for the water heater. The swich on the heater itself was for the ac heater element for the water heater.
If it is for the propane for the water heater you should have a little red lite on the switch, I have that to. If you are lets say showering and running out of hot water then if you put that switch on even with the electric switch on it will bring on the burner to heat the water faster then the red light would go off and electric only will stay on. turn off your switch for the hot water and just put that switch on. Run your hot water, when it gets cold you will here the burner come on. Other then that it's for tank heaters.......easy way to tell.