How to Fix / Troubleshooting

Safety first: Turn off power before reaching into the tub or working underneath.

Step-by-step checks:

Check load: Ensure utensils are not protruding through the basket and hitting the spray arms. Reposition tall items.
Inspect spray arms: Spin them by hand to confirm they rotate freely and do not contact racks or dishes.
Clean sump: Remove filters and inspect for hard objects (glass, bones, seeds) in the sump that could contact the impeller.
Level and secure: Confirm the dishwasher is level and that side/top mounting brackets are tight to prevent vibration.
Persistent grinding: If noise continues, the circulation pump bearings may be worn and the pump assembly should be replaced.

Warning: Do not ignore grinding noises; they often indicate impending pump failure.

Dishwasher makes loud grinding, rattling, or buzzing noises during operation.

Possible Causes