Garbage Disposals Jam and Have a Reset Button

A kitchen disposal that stops working produces one of two symptoms, and each points to a different fix. Both are recoverable in a few minutes without tools more specialized than a hex key.

Humming means the motor is stalled

A hum with no rotation indicates the motor is receiving power but cannot turn. Something has wedged between the spinning plate and the fixed grind ring around it.

Leaving it humming overheats the motor quickly, so the switch should be turned off immediately. The internal overload protector will cut power on its own if it is not.

Most units have a hex socket in the center of the underside. Turning it back and forth with the supplied wrench rotates the plate manually and frees whatever is caught.

Silence usually means the overload has tripped

A thermal overload switch protects the motor from burning out, and it pops when the unit has been stalled or run too long. It appears as a small red button underneath the disposal.

The motor needs a few minutes to cool before the button will stay in. Pressing it repeatedly while the motor is still hot achieves nothing.

If the button holds and the unit still does nothing, the problem is upstream, in the switch, the outlet under the sink or the circuit itself.

Power comes off before hands go in

Reaching into a disposal is safe only with the circuit off, not merely the wall switch, because a switch can be flipped by anyone and a stuck relay can close on its own.

Objects are removed with tongs or pliers rather than fingers. The grind ring has no blades, but it has sharp edges and the plate can rotate unexpectedly as an obstruction releases.

Silverware, bottle caps and small bones are the usual causes, and they arrive by falling into an open drain rather than by being put in deliberately.

What goes in determines how often this happens

Fibrous material such as celery and onion skins wraps around the plate rather than breaking up. Starchy waste like rice and pasta swells and forms a paste in the trap below.

Grease is the slower failure. It pours in as liquid, cools in the drain line and accumulates into a blockage that a disposal cannot clear.

Running cold water throughout and for a while afterward keeps fats solid so they are carried away in pieces rather than coating the pipe.