GE Profile Dishwasher: Troubleshooting Spray Arm Issues... | appliancefaults.com

Technical Background:

The main control board (MCU) sends 120V AC to the diverter motor to alternate water flow between the upper and lower spray arms. The diverter motor turns a valve, directing water to the appropriate spray arm. If the MCU does not send voltage, or the motor fails, the spray arms will not function correctly.

Symptoms:

The upper or lower spray arms are not spraying effectively, resulting in poorly cleaned dishes. You may hear a humming sound, or no sound at all, from the diverter motor area. The wash cycle might take longer than usual.

Possible Causes:

Clogged spray arms impeding water flow.
Failed diverter motor.
Faulty diverter valve.
Wiring harness damage to the motor.
Issue with the main control board (MCU).

Solution:

1

Disconnect power to the dishwasher at the breaker panel.
2

Remove the lower spray arm by twisting it counterclockwise. Inspect for clogs and clean thoroughly.
3

Remove the middle spray arm assembly. Inspect and clean any clogs.
4

Locate the diverter motor at the base of the dishwasher. You may need to remove the lower access panel to gain access.
5

Disconnect the wiring harness from the diverter motor.
6

Using a multimeter, check for 120V AC at the wiring harness connector during the wash cycle. A lack of voltage indicates a potential issue with the main control board.
7

If voltage is present, use a multimeter to check the diverter motor winding resistance. A reading of infinity or zero ohms indicates a failed motor.

Safety Warning:

Always disconnect power to the dishwasher at the breaker panel before performing any repairs. Use Lock Out Tag Out (LOTO) procedures to prevent accidental re-energizing of the circuit. Dishwashers operate on 120V AC, which can be lethal. Wear appropriate safety glasses and gloves.

Prevention:

Run a dishwasher cleaner monthly to prevent buildup and clogs. Avoid overloading the dishwasher, which can restrict water flow. Periodically inspect the spray arms for any signs of damage or debris.

Expert Tip:

Enter service mode by pressing and holding the Start button for 5 seconds. This will initiate a diagnostic cycle that can help pinpoint the source of the problem. Check the error codes displayed. A common code associated with the diverter motor is error 621 or similar.

Frequently Asked Questions

•What is the correct diverter motor resistance range?

The normal resistance range for a GE Profile diverter motor is typically between 50-150 ohms. Consult the service manual for the specific resistance value for your model.

•How do I replace the diverter motor?

After disconnecting power, remove the screws securing the diverter motor to the dishwasher base. Disconnect the wiring harness and carefully remove the old motor. Install the new motor in reverse order, ensuring the diverter valve aligns correctly.

•What if there is no voltage at the diverter motor connector?

If there is no voltage, the issue is likely with the main control board (MCU) or the wiring between the MCU and the diverter motor. Inspect the wiring for any breaks or damage. If the wiring is good, the MCU may need to be replaced.

GE Profile Dishwasher: Troubleshooting Spray Arm Issues & Diverter Motor

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct diverter motor resistance range?

•How do I replace the diverter motor?

•What if there is no voltage at the diverter motor connector?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: