When your garbage disposal motor hums or remains silent and fails to spin, you must diagnose the mechanical and electrical causes safely. Step 1: Check the power supply by pressing the red reset button underneath the unit and verifying that the wall circuit breaker is on. Step 2: If the unit hums, unplug it and insert a 1/4-inch hex wrench into the bottom motor socket, rocking it back and forth to clear any physical jams locking the flywheel. Step 3: Remove any dropped silverware or hard bones from the grinding chamber using tongs. Verification: Plug the disposal back in, turn on cold water, and flip the wall switch to verify normal motor rotation.
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