Dishwasher makes loud grinding or rattling noises during wash or drain.

Safety: Disconnect power and allow hot water to cool before reaching into the sump.

Steps:

• Inspect interior: Check that utensils are secured and not protruding through the basket, hitting spray arms.
• Check spray arms: Spin them by hand to ensure free movement and no contact with dishes.
• Inspect sump: Remove filters and look for glass, stones, or other debris. Remove carefully.
• Check pumps: If noise persists, access circulation and drain pumps from the base and inspect impellers for foreign objects or damage. Replace pump if bearings are worn and noisy.