If your garbage disposal motor refuses to turn on, follow a safe troubleshooting sequence. First, check the power supply by pressing the red reset button on the bottom of the unit and verifying that the under-sink GFCI outlet or main circuit breaker has not tripped. If the unit hums but does not spin, unplug it and insert a 1/4-inch hex wrench into the bottom motor socket to clear a mechanical jam. Verification: Plug the unit back in, turn on cold water, and flip the wall switch to confirm normal motor rotation.
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