Thx so much. I have both 12V and 120 switches on and it is working. my question is can I fire up the hot water heater with just the 120 switch on? I ask because I thought I needed the 12v on to ignite the water heater regardless if I was using the propane or 120.
If you have shore power, you can run the water heater using only the 120V function. If you're boondocking, then leave the 120V switch off and use the propane (heater) switch on the monitor panel. You can, however, run the water heater on both 120V and 12V at the same time to get a faster recovery, like if two or more people want to take showers. Sometimes, if the propane tanks have been off for a while, it helps to light a stove burner to clear the air from the lines. If you turn on the propane switch, it should light up and the little LED next to it will also come on. Within 15 seconds, the LED should go out and you should hear the burner firing. If the LED comes back on, the system is in lock-out. Turn off the switch, wait 15 seconds, and try it again. If it continues to go into lock-out, you have a problem, possibly with the circuit board.
If the LED does not come on and the burner does not fire, check the Hi-Temp/Thermostat button on the face of the heater. It may need to be reset by pushing it. My recent problem was the Hi-Temp/Thermostat switch failed and I had to replace it. The button on the right is for the 12V system, the one on the left is for 120V.