Garbage Disposal Humming but Not Working: 6 Fixes in Order

A garbage disposal humming but not working has power at the motor and a grinding plate that cannot turn, so cut the power, free the plate with a 1/4 inch hex wrench, remove the jam and reset.

Why is my garbage disposal humming but not working?

A garbage disposal humming without grinding is getting power, but the motor cannot turn the grinding plate. Most often something hard is wedged between a lug on the plate and the fixed grind ring around it. The motor pulls current, makes the hum, and spins nothing. If the plate turns freely and the unit still hums, the fault is in the motor itself.

The sound tells you which page you need. A hum points to a jam or a motor fault and this guide. Dead silence points to power: a tripped reset button, a breaker, a switch or the cord, which our guide to a garbage disposal not working at all walks through.

What should you do first when a garbage disposal hums?

Fix 1 is to kill the power before anything else. Flip the wall switch off the moment you hear the hum, then unplug the cord under the sink or switch off the disposal breaker before you touch the unit. InSinkErator’s jam guide starts with the switch off and says never to place your hand in the disposal at any time.

Waste King says a jammed grinding plate can overheat the motor and trip the reset button, so the longer it hums, the more likely you add a cool-down wait to the wrench job.

1. Turn the wall switch or air switch button off.
2. Unplug the disposal cord, or turn off its breaker if the unit is hardwired.
3. Turn off the faucet. If the sink is full, let it drain or bail it with a pot, per InSinkErator.
4. Gather a flashlight, tongs or long pliers, and the hex wrench.

How do you free a jammed garbage disposal with a hex wrench?

Fix 2 is to turn the motor shaft by hand from below. InSinkErator says to put its Jam Buster wrench, or any standard 1/4 inch Allen wrench, into the hex hole at the dead center of the bottom, facing the floor. Turn it like a crank, back and forth, until it spins in complete circles in both directions.

The Jam Buster wrench is silver, about four inches long and shaped like a small crank. A long-arm Allen key from a hardware store gives better reach than a short L-key in a cramped cabinet.

1. Lie on your back with the flashlight and find the hex socket in the center of the bottom plate.
2. Seat the short end of the wrench fully in the socket.
3. Rock it back and forth. InSinkErator says it is OK to use some force, because the wrench is built to bend before the disposal is damaged.
4. Keep working until the wrench turns full circles both ways with no catch.
5. Pull the wrench out before you restore power.

Not every unit has a socket. InSinkErator Builder Series, Amana and ES models are freed from above: you rotate the turntable in either direction with a wooden spoon. Waste King gives the same choice, a wooden spoon or an unjamming wrench, to check whether its turntable rotates freely. Check your model manual if you see no hex hole.

How do you get the jammed object out of a garbage disposal?

Fix 3 is to find and remove whatever stalled the plate, using tongs or pliers and never your fingers. Shine a flashlight down the drain and look at the edge of the shredding disk, where the small teeth sit, as InSinkErator directs. Freeing the plate only loosens the object. Leave it in and the disposal jams again on the next start.

The Waste King support FAQ tells owners to keep large whole bones, clam shells, oyster shells, whole corn husks, glass, china and plastic out of the chamber.

• Metal: bottle caps, twist ties, screws, coins and small spoons that slid past the splash guard.
• Hard food: large whole bones and seafood shells that a small motor cannot break.
• Breakage: glass and china fragments from a dropped dish.
• Stringy waste: whole corn husks, which wrap the plate instead of grinding.

Here is the correction to a common rule. Waste King lists small bones and fruit pits as acceptable food waste, so a peach pit is not automatically a jam. Feeding hard pits one at a time, not buried under a load of peels, still keeps the strain off a small motor.

When should you press the garbage disposal reset button, and how long should it cool?

Fix 4 is the reset, and it comes after the jam is cleared. On standard InSinkErator models, the overload protector is a small square red button on the bottom. A tripped button sits about 1/4 inch (5 mm) lower than normal. Press it gently. If it will not stay in, wait 10 minutes and press again.

Waste King says to push its button in until it clicks and stays depressed. Reset only after clearing the jam, or the stalled plate trips the overload again on the next start.

Some models have no red button. InSinkErator says EZ Connect units use an automatic overload. Leave the wall switch off, or unplug a unit run by a push-button air switch, for up to 20 minutes, and the same applies to Builder Series, Amana and ES models. Our garbage disposal reset button guide covers locating the button on each brand.

How do you test a garbage disposal after clearing the jam?

Fix 5 is a controlled restart. Plug the unit back in or flip the breaker on, start a moderate flow of cold water, then turn the disposal on. InSinkErator says to keep the cold water running for a few seconds after grinding stops and to skip hot water while grinding. A healthy unit settles into a steady whir instead of a hum.

1. Confirm the wrench is out of the socket and the tongs are out of the chamber.
2. Restore power at the plug or breaker.
3. Run cold water at a moderate flow.
4. Turn the disposal on and listen for an even whir.
5. If it hums again, switch off and repeat Fixes 2 to 4. InSinkErator says freeing a stubborn jam may take several rounds.
6. If it stays silent, check the service panel for a tripped breaker or blown fuse, as InSinkErator advises.

If the disposal plugs into a GFCI outlet, check whether that outlet has tripped, press its reset button, then test again.

What does it mean if the garbage disposal still hums with a free flywheel?

Fix 6 is recognizing a dead motor. If the plate spins full circles both ways with the wrench, the chamber is empty, the reset holds and the unit still only hums, the motor cannot start on its own. Appliance repair guides trace this to burned windings, a failed start circuit on units built with one, or bearings seized by age. Replacement is the usual fix.

Disposals use either induction or permanent-magnet motors, which our types of garbage disposals page compares. Either way, a motor-level repair rarely beats a new unit. HomeAdvisor’s 2026 cost guide lists new units from $50, and it expects a disposal to last five to 10 years.

HomeAdvisor’s 2026 guide prices 1/3 to 1/2 HP units at $50 to $225, 5/8 to 3/4 HP at $120 to $310, and 1 to 1-1/4 HP at $200 to $400. Labor runs $50 to $100 per hour, and Angi puts a simple pro install at 45 to 60 minutes.

How do you stop a garbage disposal from humming and jamming again?

Most repeat hums come from what goes down the drain and how fast. Feed scraps a handful at a time with cold water running, keep the hard items Waste King names out of the sink, and never pour grease or fat down the drain, which InSinkErator rules out entirely. A unit sized to your cooking stalls less often too.

• Run a moderate flow of cold water before, during and for a few seconds after grinding.
• Feed hard scraps like small bones or pits one at a time, not under a pile of peels.
• Keep large whole bones, clam and oyster shells, whole corn husks, glass, china and plastic out.
• Pour grease and fat into the trash, never the disposal.
• Keep the drain stopper in when the unit is off, so caps and utensils cannot fall in.
• Store the Jam Buster wrench under the sink so the next jam takes minutes, not a hardware run.
• Scrub the splash guard and chamber on a schedule, following our guide on how to clean a garbage disposal.