This is a replacement power relay for your Atwood water heater. When the switch for Electric is turned on, power is sent from the board to the yellow wire. The yellow wire carries DC voltage to the relay in the back of the water heater. The 12 volt energizes the relay which sends the 110V AC to the element.

If you have no power passing through the relay. Check the breakers and fuses related to the water heater in your distribution panel. Confirm AC power is present. Confirm DC power is present through the yellow wire from the board. Check the AC power to the element, if there is no power, replace the relay. If there is power to the element but no heat, replace the element.

Compatible with: GCH6A-10E, GC6AA-10E, GC10A-4E, GCH10A-4E