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

Safety first: Turn off power before reaching into the sump or removing pumps.

• Check spray arms: Spin each spray arm by hand to ensure they rotate freely and do not contact racks or tall items. Remove any items blocking rotation.
• Inspect sump: Remove filters and look for foreign objects such as glass, bones, or utensils. Remove carefully.
• Check drain pump: Access the drain pump and inspect the impeller area for debris. Remove any obstructions.
• Circulation pump noise: If noise persists and seems to come from the circulation pump, the bearings may be worn. Replace the pump assembly if the noise is severe.