Café Pump or Motor Bearing Wear

Dishwasher makes a high-pitched squealing or whining noise during operation.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Worn circulation pump bearings, Worn drain pump bearings, Cavitation due to low water level, Debris partially contacting impeller

Safety first: Turn off power and water before working under the unit.

Verify water level: Ensure the dishwasher is filling properly; low water can cause pump cavitation and noise.
Clean sump and filter: Remove any debris that could contact the impeller.
Isolate the noise: Listen during wash and drain to determine if the noise occurs during circulation or draining.
Inspect pumps: Pull the unit out, remove the bottom panel, and run briefly (if safe) to pinpoint the noisy pump. Replace the circulation or drain pump if bearings are worn.

Hard 4/5

Circulation Pump Motor Assembly

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