Whirlpool Dishwasher Sump Assembly Leaking: Motor Seal... | appliancefaults.com

Technical Background:

The dishwasher's main control unit (MCU) controls the sump motor, which circulates water during wash and drain cycles. The motor receives 120V AC power. The sump assembly houses the motor and seal, which prevents water from leaking. A failure in the seal's integrity allows water to escape.

Symptoms:

The homeowner observes water leaking from underneath the dishwasher, specifically near the front. There may be standing water in the dishwasher after a cycle or water pooling on the floor.

Possible Causes:

Worn or damaged sump motor seal.
Cracked or damaged sump housing.
Loose sump mounting bolts.
Debris obstructing the seal.
Excessive dishwasher detergent usage.
Hard water deposits deteriorating the seal.

Solution:

1

Disconnect power to the dishwasher at the breaker panel. Verify 0V AC at the dishwasher junction box using a multimeter.
2

Disconnect the water supply line.
3

Remove the dishwasher from under the counter. A 1/4-inch nut driver may be required to remove mounting screws.
4

Access the sump assembly by removing the lower access panel.
5

Disconnect all wires connected to the sump motor. Label wires before disconnecting. Use a 5/16-inch socket to remove sump mounting bolts.
6

Inspect the sump housing and motor seal for cracks or damage. Replace the sump assembly if damaged.
7

Install the new sump assembly, reconnecting all wires and securing mounting bolts. Ensure proper seal alignment.

Safety Warning:

Always disconnect power to the appliance before performing any repairs. Lock-out/Tag-out (LOTO) procedures must be followed. High voltage (120V AC) is present within the appliance.

Prevention:

Use the recommended amount of dishwasher detergent. Regularly inspect the sump area for leaks. Use a dishwasher cleaner to prevent hard water buildup. Consider installing a water softener if you have hard water.

Expert Tip:

After replacing the sump, run the dishwasher through a short cycle and carefully inspect for any leaks. Many Whirlpool dishwashers have a service mode accessible by pressing a specific button sequence (check the tech sheet). This allows you to run diagnostic cycles for testing.

Frequently Asked Questions

•What is the correct torque specification for the sump mounting bolts?

The torque specification for the sump mounting bolts is typically around 60-80 inch-pounds. Always refer to the service manual for the specific model.

•Can I use a sealant on the new sump motor seal for extra protection?

It is generally not recommended to use sealant unless specified by the manufacturer. Using the wrong sealant can damage the seal or cause other issues. Ensure the seal is properly seated and the surfaces are clean.

•How do I properly dispose of the old sump assembly?

Dispose of the old sump assembly according to local regulations. The motor may contain components that require special handling. Check with your local waste management facility.

Whirlpool Dishwasher Sump Assembly Leaking: Motor Seal Repair Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the correct torque specification for the sump mounting bolts?

•Can I use a sealant on the new sump motor seal for extra protection?

•How do I properly dispose of the old sump assembly?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: