Dishwasher makes loud grinding or rattling noises during wash.

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

• Check spray arms: Ensure spray arms spin freely and are not hitting tall dishes or racks. Rearrange dishes if necessary.
• Inspect sump for debris: Remove filters and look for glass, bones, or other hard objects. Remove carefully.
• Access circulation pump: If noise persists, remove the circulation pump and inspect the impeller and housing for damage or trapped debris.
• Replace pump if worn: If the pump bearings are noisy or the impeller is damaged, replace the circulation pump assembly.