Garbage disposal vibrates excessively and the entire sink shakes during operation.

Safety First: Turn OFF power at the switch and breaker before adjusting the mounting hardware.

Step-by-step:

• 1. Check for loose mounting: Grasp the KitchenAid disposal body and try to move it up and down. Any play indicates a loose mounting ring.
• 2. Tighten mounting ring: At the top of the unit, locate the three mounting lugs on the mounting ring. Use a screwdriver to rotate the ring clockwise, locking it firmly onto the sink flange until all three lugs are fully engaged.
• 3. Inspect sink flange: From above the sink, press around the flange to ensure it is sealed and not lifting. If it moves, the plumber's putty seal may have failed and the flange must be reinstalled.
• 4. Check for foreign objects: Look inside the chamber for large unground items that could cause imbalance and remove them with tongs.
• 5. Test operation: Restore power, run water, and briefly operate the disposal. Minor vibration is normal; strong shaking indicates a mounting or internal balance issue.

When to call a technician: If the mounting assembly is cracked or the sink itself flexes excessively, professional repair or reinforcement may be needed.