If a garbage disposal does nothing, start with power and the reset button; if it hums but does not turn, it may be jammed. Never put your hand inside or work on the unit while it is energized.
Separate silence from humming
Complete silence points toward power, the switch, or thermal protection. A hum means the unit is receiving power but the motor cannot rotate freely.
Check power without opening wiring
Check the plug, wall switch, and circuit protection. If the model has a reset button, use it only with the disposal switched off and after it has cooled.
If it hums, disconnect power before clearing a jam
Use only the manufacturer-approved wrench or tool at the intended access point. Never insert fingers even when the wall switch is off.
Burning smell or repeated resets need service
If it repeatedly trips, leaks, or smells burnt, leave it out of service. The motor, wiring, or seals may need repair or replacement.