When a garbage disposal just hums without spinning, it indicates that the electrical motor is receiving power but the internal flywheel is physically jammed by foreign objects or food debris. First, turn off the wall switch and unplug the unit to prevent injury. Use an Allen wrench in the bottom hex socket to manually unjam the blades. Once the obstruction is cleared and the blades spin freely, press the red reset button on the bottom housing to restore normal electrical continuity and test the motor.
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