Troubleshooting Furrion RV Tankless Water Heater Wall Controller Not Powering On

Question:

My wall controller does not light up

asked by: David P

Expert Reply:

You will want to check for power going into your Wall Controller # FR48NR by removing it from the wall and testing the wires with a Circuit Tester # PTW2992 that shows you battery voltage or by using a Multimeter # PT89ZR. Both wires will be blue and polarity doesn't matter you just need to identify if you are getting 12 volts of power to the controller and have a good ground. Be sure that the power switch on the outside portion of the water heater is switched on. If you have power at the wiring your controller is bad and needs replaced.

If you do not have 12 volts of power you will need to check the back of the water heater. There you will find both the 12 volt input wires(white and black) as well as the wall controller(blue wires). You can use the tester to check both sets of these wires as well to ensure that you do have 12 volts of power going to the unit(black wire) and a good ground(white wire). Also by testing the blue wires at the water heater this will let you know if the wiring is damaged that goes to your controller.

expert reply by: Bud M

Jess

11/10/2024

Hello, How do I remove this from the wall? No access behind it. Tried twisting but it seems stuck. I don’t want to twist to hard and break something. Is this the correct way to take it off? We have been having E1 errors for over a month. Now suddenly the controller has no power but the hot water is still working. Thank you