Whirlpool TotalCoverage Dishwasher Spray Arm Gear Drive... | appliancefaults.com

Technical Background:

The Whirlpool TotalCoverage dishwasher utilizes an electronic control board (ECB) to manage the wash cycle. The ECB sends a 120V AC signal to the spray arm drive motor to initiate rotation. The gear drive then translates this rotational force to the spray arm. A failure in any component of this system results in improper spray arm function.

Symptoms:

Homeowners often report dishes not being cleaned thoroughly, particularly on the lower rack. They may also notice the lower spray arm not rotating, or rotating intermittently.

Possible Causes:

Stripped or broken gear teeth within the spray arm drive assembly.
Faulty drive motor responsible for rotating the spray arm.
Obstruction preventing the spray arm from rotating freely.
Defective electronic control board (ECB) not sending the correct signals to the motor.
Wiring harness damage or loose connections impacting motor power.

Solution:

1

Disconnect power to the dishwasher at the breaker panel. Verify 0V AC at the dishwasher's power receptacle using a multimeter.
2

Remove the lower spray arm and inspect it for obstructions. Check that it spins freely.
3

Locate the spray arm drive assembly, usually accessible from inside the dishwasher cavity after removing the spray arm.
4

Inspect the gear drive for damaged or worn gears. If damage is evident, replace the entire drive assembly.
5

Using a 1/4-inch nut driver, remove the drive motor. Test the motor windings for continuity using a multimeter. If open or shorted, replace the motor.
6

Check the wiring harness and connections to the drive motor and control board for damage or looseness. Repair or replace as needed.
7

If the motor and wiring check out, the electronic control board may be faulty. Replace the ECB. Consult the service manual for specific replacement instructions.

Safety Warning:

Always disconnect power to the appliance at the breaker panel before performing any repairs. Lock Out/Tag Out (LOTO) procedures should be followed. High voltage is present inside the appliance, posing a risk of electric shock.

Prevention:

Regularly inspect the spray arms for clogs and obstructions. Ensure proper loading of dishes to avoid blocking the spray arms. Use recommended dishwasher detergents and rinse aids.

Expert Tip:

To enter the service mode on some Whirlpool TotalCoverage models, press and hold the 'High Temp Wash' and 'Heated Dry' buttons simultaneously for 5 seconds. This allows access to diagnostic codes and component testing.

Frequently Asked Questions

•What is the resistance range I should expect when testing the spray arm drive motor windings?

Typically, the resistance of the spray arm drive motor windings should be between 40-80 ohms. Consult the service manual for the exact specification for your specific model.

•How do I determine if the electronic control board (ECB) is sending the correct voltage to the spray arm motor?

Using a multimeter, set to AC voltage, measure the voltage at the motor connection points during the wash cycle when the spray arm should be rotating. You should see approximately 120V AC. If no voltage is present, the ECB may be faulty.

•Where can I find a replacement spray arm drive assembly for my Whirlpool TotalCoverage dishwasher?

You can find replacement parts at appliance parts retailers, both online and locally. Be sure to have your dishwasher's model number handy to ensure you order the correct part. Some common retailers include RepairClinic, AppliancePartsPros, and Sears PartsDirect.

Whirlpool TotalCoverage Dishwasher Spray Arm Gear Drive Failure: Repair Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the resistance range I should expect when testing the spray arm drive motor windings?

•How do I determine if the electronic control board (ECB) is sending the correct voltage to the spray arm motor?

•Where can I find a replacement spray arm drive assembly for my Whirlpool TotalCoverage dishwasher?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: