Garbage disposal makes a loud metallic grinding or rattling noise during operation.

Safety first: Turn off the wall switch and isolate power at the breaker. Confirm the unit cannot start.

• Visual inspection: Shine a torch into the sink opening. Look for foreign objects resting on the shredder ring or between impeller lugs.
• Remove objects: Use long-nose pliers, tongs, or a magnetic pickup tool to remove metal items. Never insert your hand into the disposal.
• Check impeller lugs: Gently move the impeller lugs with a wooden spoon handle. They should pivot freely but not be loose or detached. If a lug is broken or missing, the grinding plate assembly should be replaced.
• Test run: After clearing, run cold water and briefly operate the unit. If the metallic noise persists, the shredder ring may be damaged or misaligned and continued use can damage the motor.