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

Safety first: Turn off power before inspecting internal components.

• Check for dish interference: Run a short cycle and listen. Open the door mid-cycle (after pausing) and verify that spray arms are not hitting tall items or utensils. Rearrange dishes as needed.
• Inspect sump for debris: Remove filters and look for glass, bones, or hard objects in the sump. Remove any debris carefully.
• Check pump noise: If a loud grinding or humming persists, access the underside and listen near the circulation pump and drain pump during operation. A failing pump often makes a loud, rough sound and should be replaced.
• Secure mounting: Ensure the dishwasher is firmly attached to the cabinet with mounting brackets to reduce vibration noise.