Dishwasher is unusually loud, with grinding, rattling, or buzzing noises during operation.

Safety First: Turn off power at the breaker before reaching into the sump or under the unit.

• Identify noise source: Note whether the noise occurs during fill, wash, or drain.
• Check spray arms: Ensure arms spin freely and are not contacting dishes or racks.
• Inspect sump for debris: Remove filters and look for bones, glass, or other objects that could contact the impeller.
• Check installation: Verify the dishwasher is level and that side mounting brackets are secure to the cabinet.
• When to call for service: Persistent grinding or loud buzzing often indicates a failing pump that should be replaced.