Display shows E5 and unit will not enter regeneration when commanded

Safety first: Unplug the softener before testing the motor or board. Bypass water if you need to remove the valve head.

Steps to check:

• 1. Inspect motor connector: Ensure the motor plug is fully seated on the control board and at the motor terminals.
• 2. Test motor resistance: Use a multimeter to measure motor coil resistance and compare to Whirlpool specifications. Replace the motor if open or shorted.
• 3. Check for 24V (or specified) output: During a commanded regeneration, the board should send low-voltage power to the motor. If the motor is good but no voltage is present, the board's motor drive circuit is likely faulty.
• 4. Replace defective component: Replace the rotor/valve motor if it fails tests. If the motor is good but E5 persists, replace the electronic control board.

When to call a technician: If you are not comfortable measuring live low-voltage circuits, seek professional service.