Bertazzoni Circulation Pump Bearing Wear / Cavitation

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

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, Air in hydraulic system, Restricted water flow to pump, Impeller damage

Safety first: Disconnect power before accessing the pump.

1. Verify water level: Ensure the dishwasher is filling to the correct level; low water can cause cavitation noise.
2. Clean filters and sump: Remove any restrictions that might starve the pump of water.
3. Inspect circulation pump: Access the pump from below and check for play in the motor shaft or signs of leakage. A noisy, worn pump typically needs replacement.

Operating with a failing pump can lead to complete loss of wash function; schedule replacement promptly.

Hard 4/5

Circulation Pump Assembly

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