How To Test Rheem Water Heater Thermostat. A water heater reset button, usually red, is located in the center of the limit switch just above the water heater thermostat. Any time that gas fittings are loosened or.
At the bottom of the water tank, remove a metal plate to reveal the thermostat you suspect is faulty. But if there are no readings then the thermostat is faulty.
16 Electric Water Heater Wiring Diagram For Rheem
Check if the gas valve has been turned off. Confirm power is off to the water heater.