Hobart dishwasher runs but is very noisy during wash or rinse, with grinding, rattling, or high-pitched sounds.

Safety first: Disconnect power before reaching into the tank or sump.

• Inspect for foreign objects: Remove racks, wash arms, and filters. Look for broken glass, cutlery, or other items in the sump and around the pump inlets.
• Check wash arms: Ensure wash arms rotate freely and are not rubbing against racks or tank walls. Replace worn bushings or arms if they wobble excessively.
• Verify water level: Confirm the tank fills to the correct level. Low water can cause pump cavitation and noise; if low, troubleshoot the fill system.
• Assess pump condition: Persistent grinding or screeching often indicates worn pump bearings. The wash or drain pump assembly may need replacement.
• Schedule service: If noise continues after clearing debris and verifying water level, have a Hobart technician inspect the pumps and motor mounts.