When a garbage disposal fails to turn on and produces zero sound or movement when you flip the wall switch, the issue is typically caused by a tripped internal thermal overload protector button, a tripped GFCI electrical outlet under the sink, or a blown house circuit breaker. When the disposal motor overheats due to a jam or heavy workload, its built-in safety breaker trips to cut off power. Verification: Press the red reset button on the bottom of the disposal unit and test the wall switch.
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