Look for a reset button
If your disposer won’t start, push the reset button and give it a spin.
On the other hand, if it hums but doesn’t spin, it may have something stuck in it. Switch the disposer off, then try working through it by turning the blades with a special disposer wrench (sold at home centers) or by turning a bottom bolt. Many disposers have an Allen wrench for that purpose, inset on the bottom of the machine.
Call Absolute Appliance Repair NOW if you have any problems with your major appliances!
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(650) 525-0512 South SF / Daly City / Pacifica