This device will turn the garbage disposal off automatically if there is something wrong. If the garbage disposal is jammed, if it is run for a very long period of time, or if there is another issue, it will shut down automatically.
How do you reset the humming on a garbage disposal?
https://www.youtube.com/watch?v=pZOrTwBjgwU
How do you fix a stuck garbage disposal button?
https://www.youtube.com/watch?v=fHAgHNyuK74
Why did my garbage disposal suddenly stop working?
Locate the reset button beneath the garbage disposal – if the button has popped out, it is likely that the garbage disposal stopped working because it tripped its built-in circuit breaker, probably due to overloading. Press in the reset button – if it does not stay depressed, wait about 10 minutes and try again.