Garbage Disposal Humming but Not Spinning? The 2-Minute Wrench Trick
A hum means the motor has power but the blades are jammed. Free them with a hex wrench from underneath, then keep that wrench in the cabinet for next time.
By Jamilur Rahman Updated November 5, 2026 · 6 min read
- Time
- 10 min
- Cost
- Under $20
- Difficulty
- Easy
In this guide
Quick answer
A garbage disposal that hums but does not spin has a jammed blade plate. The motor has power but something is wedged in the way. Turn the power off, put a 1/4-inch hex wrench into the socket under the unit and work it back and forth until the plate turns freely, then press the red reset button. Keep a disposal wrench under the sink and the next jam takes two minutes.
Free fix vs. permanent fix
Free the jam with a wooden spoon handle
- Switch the power off and unplug the unit
- Pull out what you can see with tongs, never your hand
- Lever a blade with a wooden spoon handle through the drain
- Press the red reset button and test with cold water
How long it lasts: It fixes today's jam. It is awkward to do from above, and the next jam usually arrives with no tool in sight.
A disposal wrench kept under the sink
Most disposals have a hex socket in the base. Turning it from underneath moves the blade plate with real leverage, far more than a spoon handle from above. The wrench that came with the unit usually gets lost, so a spare that lives next to the disposal turns a jam from a service call into a two-minute job.
What to get: Garbage disposal wrench (1/4-inch hex)
How long it lasts: Years. One tool, kept in the cabinet, clears every future jam in minutes.
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What you'll need
-
Flashlight
To see the blades and the socket
You have it -
Long tongs or needle-nose pliers
For pulling out the stuck item
You have it -
Wooden spoon handle
A stopgap if you have no wrench
Free - Our pick Illustration
Disposal wrench (1/4-inch hex)
Turns the blades from underneath
Why it happens
A hard item wedged in the blades
Bones, fruit pits, bottle caps, a spoon or a bit of foil can lock the flywheel. The motor hums because it has power but cannot turn the plate.
A tripped overload protector
When the motor strains, a thermal switch cuts power. A small red reset button on the bottom pops out. Pressing it resets the switch, but only works after the jam is cleared.
Fibrous or starchy food packed tight
Celery, corn husks, potato peels, rice and pasta swell and pack around the blades, especially when you run the disposal with little water.
Try this first (free)
Do these in order, starting with the simplest.
-
Turn the power off
Flip the wall switch off, then unplug the disposal from the outlet under the sink. If it is hardwired, switch off its breaker. Never put your hand in the opening, even with the power off.
-
Look inside and lift out what you see
Tool used: Long tongs or needle-nose pliersShine the light down the drain. Lift out any spoon, bone or cap with tongs or pliers.
-
Turn the blades from underneath
Tool used: Disposal wrench (1/4-inch hex)Find the hex socket in the center of the base. Push a 1/4-inch hex wrench in and work it back and forth, then turn it full circle. When it spins freely, the jam is loose. If your unit has no socket, press a wooden spoon handle on a blade through the drain and lever it around.
IllustrationCheck price on AmazonTool for this step
Disposal wrench (1/4-inch hex) · Turns the blades from underneath
-
Press the red reset button
Find the small red button on the bottom or side of the unit and push it in firmly. If it pops back out right away, wait 10 minutes for the motor to cool and try again.
-
Restore power and test with water
Plug it in and turn the switch on. Run a steady stream of cold water, then flip the disposal on for a few seconds. If it spins, run it for 30 seconds with the water on.
-
Store the wrench where you will find it
Tool used: Disposal wrench (1/4-inch hex)Hang it on a hook inside the cabinet or tape it to the side wall near the disposal. A tool you can find is the whole fix.
IllustrationCheck price on AmazonTool for this step
Disposal wrench (1/4-inch hex) · Turns the blades from underneath
When free fixes aren't enough
If the wrench turns freely, you press reset, and the unit still only hums, the motor is probably worn out. Disposals often last somewhere around 8 to 15 years, and replacement is usually the better path from there. Stop and call a plumber or electrician if water leaks from the bottom, the unit trips the breaker or smells of burning. In a rented apartment, report a disposal that will not run after a reset. Many leases make the landlord responsible for the unit.
Buy the fix
Still stuck after the free fixes? These are the products we would look at.
| Pick | Product | Fixes | Who it's for | Buy |
|---|---|---|---|---|
| Best pick | Garbage disposal wrench (1/4-inch hex) | a jammed blade plate when the disposal hums | Anyone with a disposal that has a hex socket in the base, including renters. | Check price |
| Budget pick |  1/4-inch hex (Allen) key with a long arm | the same jam, with less leverage than a T-handle | Anyone who wants the lowest-cost tool that does the job. | Check price |
Garbage disposal wrench (1/4-inch hex)
Fixes: a jammed blade plate when the disposal hums
Look for: A 1/4-inch hex tip (confirm in your disposal manual); A long or T-shaped handle for leverage; Hardened steel that does not round off.
- Who it's for
- Anyone with a disposal that has a hex socket in the base, including renters.
- Honest downside
- Your unit has no hex socket in the bottom. Check under it first.
1/4-inch hex (Allen) key with a long arm
Fixes: the same jam, with less leverage than a T-handle
Look for: Exactly 1/4 inch across the flats; A long arm of 6 inches or more; A tight fit that does not wobble in the socket.
- Who it's for
- Anyone who wants the lowest-cost tool that does the job.
- Honest downside
- You want a tool that is easy to turn one-handed. Short L-shaped keys are hard on the wrist and easy to lose.
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How we picked: How we picked: this page draws on appliance repair guides, disposal manuals and the jam problems and fixes owners describe in reviews. We do not test products by hand.
What each sound means
- Humming, no spin: power reaches the motor, but the plate is jammed. This page's fix.
- Silence: the overload switch tripped or no power is arriving. Check reset, switch, outlet and breaker.
- Metal clanking: a utensil or hard item is in the chamber. Power off, then remove it with tongs.
What not to feed a disposal
Keep out grease and fat, bulk coffee grounds, fibrous stalks such as celery and corn husks, potato peels, rice, pasta, bones and fruit pits. Always run cold water for 15 seconds after grinding, so the scraps clear the drain line.
What to skip
Reaching in by hand, and chemical cleaners
Never put your hand in a disposal, even switched off and unplugged. The blades are sharp and the motor can wake up if power returns. Skip drain cleaner in a jammed disposal as well. It can harm the unit's seals, and a splash back is a hazard.
Frequently asked questions
Why does my garbage disposal hum but not work?
Why does my garbage disposal keep getting stuck?
What size Allen wrench fits a garbage disposal?
Can I fix a garbage disposal in my apartment myself?
My disposal is not humming at all. What do I check?
Related problems
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