Dishwasher is very noisy during operation; grinding, rattling, or humming sounds.

Safety first: Disconnect power and allow the machine to cool before inspecting the sump or base.

• 1. Check for loose items: Inspect the tub for utensils or small objects that may contact the spray arms. Ensure spray arms spin freely without hitting racks or dishes.
• 2. Clean sump area: Remove filters and look into the sump. Remove any glass, bones, or hard debris that could contact the pump impeller.
• 3. Level the dishwasher: Adjust the front feet and, if accessible, rear feet so the dishwasher is level side-to-side and front-to-back. This reduces vibration.
• 4. Listen to pumps: Run a cycle and identify whether noise occurs during wash (circulation pump) or drain (drain pump). A loud grinding from the wash phase often indicates worn bearings.
• 5. Replacement: If the circulation pump is excessively noisy despite being free of debris, replace the pump assembly.
• 6. Technician help: For bearing or motor replacements, a professional is recommended.