Check the power source: Make sure the disposal is properly plugged in and the outlet has power. If it’s hardwired, check the circuit breaker or fuse. Reset the disposal: Locate the red or black reset button located near the base of the unit and press it. Clear jam: If the disposal is jammed with food or other debris, turn off the power and use a wrench or pliers to manually turn the blades to clear the jam. Replace the fuse or reset the circuit breaker if tripped. Check the switch: If the disposal still won’t turn on, the switch may be faulty. Locate the switch near the sink and test it with a multimeter to see if it’s working properly. If none of these steps work, the problem may be with the motor or other internal components, and you may need to replace the disposal or call a professional for repair.