Dishwasher makes loud banging or knocking noises during operation.

Safety first: Disconnect power and close water supply if working on plumbing.

• Inspect spray arms and racks: Ensure spray arms are properly clipped in and not striking tall items in the racks.
• Secure hoses: Remove side panels and check that internal hoses are clipped and not free to bang against the cabinet.
• Check installation: Confirm the dishwasher is level and secured with mounting brackets to prevent movement.
• Water hammer arrestor: If banging occurs when the inlet valve closes, consider installing a water hammer arrestor on the supply line.