If your garbage disposal has stopped working, follow a structured diagnostic and repair process. Prerequisite: Ensure power is disconnected before servicing. First, check if the unit hums; if so, clear a mechanical jam by inserting a 1/4-inch hex wrench into the bottom motor socket and rocking it back and forth. If the unit makes no sound, press the red thermal reset button on the bottom housing and verify the under-sink GFCI outlet is active. Verification: Restore power, turn on cold water, and flip the wall switch to confirm that the motor spins and grinds normally without unusual noises.
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