Disposal causes a loud thump or bang when starting or stopping.

Safety first: Turn off power before working under the sink.

• Check mount tightness: Ensure the Quick Lock® mounting ring is fully rotated to the locked position and that the disposal does not move when pushed.
• Inspect support: Verify that the discharge piping is properly supported and not using the disposal as a structural support.
• Check rubber gasket: Inspect the rubber mounting gasket between the disposal and sink flange for deterioration. Replace if cracked or compressed.
• Test: After tightening and adjustments, run the disposal to see if the thump is reduced.