Rheem · Air Conditioning
The heating elements may be mis-wired, or the control board may have failed. This has disabled the heater, and electrical connections need to be checked.
Click steps to track your progress.
Turn off the power to the unit.
Inspect the wiring connections at the heating element.
Ensure wires are correctly connected at both the element and the control board.
Check the heating element's resistance if wiring is confirmed correct. Replace the board if resistance is good, or the element if resistance is bad.