How to Fix a Jammed Garbage Disposal
Updated September 18, 2026
Can I do this myself?
DIY with precautions
Yes, most jams are a safe DIY fix if the disposal is unplugged or its circuit is switched off first and you never put your hand inside. The risks are serious hand injury and electric shock, both avoidable.
A garbage disposal (food waste disposer) that hums but doesn’t spin, or does nothing at all when you flip the switch, is almost always jammed or has tripped its built-in overload protector. The usual culprit is something hard caught between the spinning plate (flywheel) and the grind ring: a fruit pit, a bone, a bottle cap, a piece of cutlery or a build-up of fibrous peels.
The fix rarely needs tools beyond the small hex key that came with the unit. Most disposals have a hex socket in the centre of the underside that lets you turn the motor by hand from below the sink, plus a small red reset button. Freeing the flywheel, removing the object with tongs and resetting the motor solves the large majority of jams.
The one rule that matters above all others: the power must be off before you reach anywhere near the disposal, and your hand never goes into the grinding chamber, even with the power off. A motor can start unexpectedly if someone hits the switch, and the grind ring has sharp edges.
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Signs of the problem
- A low hum when switched on, but the disposal doesn’t grind
- Nothing happens at all when you flip the switch
- The disposal starts, then stops after a few seconds
- Grinding or rattling noise, as if something metal is loose inside
- Water backs up in the sink on the disposal side
- The red reset button on the bottom has popped out
Common causes
Hard object wedged in the flywheel
Most commonPits, bones, shells, bottle caps, twist ties and small cutlery get caught between the impellers and the grind ring. The motor gets power but can’t turn, so it hums. This is the most common cause by far.
Tripped thermal overload
Most commonWhen the motor stalls or overheats, a built-in protector cuts power and the reset button pops out. The disposal then does nothing until the button is pressed back in, usually after the jam is cleared.
Fibrous or starchy food build-up
SometimesOnion skins, corn husks, celery, potato peels, rice and pasta can form a dense mat that binds the flywheel or clogs the drain line below it. Grease that has hardened makes this worse.
No power to the unit
SometimesIf there is no hum at all and the reset button is in, the problem may be a tripped breaker or blown fuse, a switched outlet that is off, a faulty wall switch or a loose plug under the sink.
Worn or failed motor
Less commonOlder units can seize from rust or worn bearings. If the flywheel turns freely by hand, the reset button is in and power is present, yet the motor still only hums, the motor itself is probably failing.
Safety first: before you start
- Critical:Unplug the disposal under the sink, or switch off its circuit at the breaker or fuse box, before doing anything else. Turning off the wall switch alone is not enough.
- Critical:Never put your hand or fingers into the disposal, even with the power off. Use tongs or long pliers to remove objects.
- Tell everyone in the house not to touch the disposal switch while you work, or tape it in the off position.
- Use a flashlight to look inside, not your fingers.
- Don’t pour chemical drain cleaners into a disposal. They can splash back when you work on it and damage seals.
Tools & materials
Tools
- Disposal hex key (usually 1/4 inch or 6 mm Allen key)
- Kitchen tongs or long needle-nose pliers
- Flashlight
- Broom handle or wooden spoon handle (for units without a hex socket)
- Bucket and old towels
Materials
- Ice cubes (for cleaning after the fix)
- Baking soda and white vinegar (optional, for odours)
Step-by-step fix
- 1
Cut the power completely
Switch the disposal off at the wall. Then, under the sink, unplug the disposal’s power cord from its outlet. If it is hardwired (no plug), switch off its circuit at the breaker or fuse box. Try the wall switch once to confirm nothing happens.
Warning: Don’t rely on the wall switch alone. Someone could flip it while you are working, or it may be wired to the wrong unit.
- 2
Look inside with a flashlight
Remove the splash guard if it lifts out and shine a flashlight into the chamber. Often you can see the offending object, such as a pit, a spoon or a bottle cap, sitting on the flywheel.
- 3
Remove visible objects with tongs
Grab anything you can see with kitchen tongs or long pliers and lift it out. If it is wedged tight, don’t yank it. Loosen it first by turning the flywheel from below in the next step.
Warning: Never reach in with your hand. The grind ring edges are sharp enough to cut, even with the motor off.
- 4
Free the flywheel with the hex key
Find the hex socket in the centre of the disposal’s underside. Insert the hex key and work it back and forth, a quarter turn each way, until it moves through full turns freely. This breaks the jam loose. If your unit has no socket, you can push against an impeller from above with a broom handle or wooden spoon handle to rock the flywheel.
Tip: If you lost the key that came with the disposal, a standard 1/4 inch Allen key fits most units. Some hardware stores sell a dedicated disposal wrench.
- 5
Clear out the loosened debris
With the flywheel moving freely, look in again and remove anything that has come loose with tongs. Small fragments can be left to wash through once the unit is running.
- 6
Wait, then press the reset button
Let the motor cool for 5 to 10 minutes if it has been humming. Then press the small red reset button on the bottom or side of the unit until it clicks and stays in. If it won’t stay in, wait a few more minutes and try again.
- 7
Restore power and test with cold water
Plug the disposal back in or switch the circuit back on. Run a strong stream of cold water, then turn the disposal on. It should spin up smoothly. Let it run for 15 to 30 seconds to flush the chamber and drain.
Warning: If it hums again, turn it off immediately to avoid burning out the motor, cut the power, and repeat the hex key step.
- 8
Check for no power if it still won’t start
If there is no sound at all and the reset button is in, check the breaker or fuse box and any GFCI outlet in the kitchen that may feed the disposal. If power is present at the outlet and the unit is still dead, the switch or the motor may be faulty.
- 9
Clean and deodorise
Grind a handful of ice cubes with cold water running. Ice knocks residue off the impellers and grind ring. For odours, pour in some baking soda followed by white vinegar, wait a few minutes, then flush with cold water.
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How to check it's fixed
- The disposal spins up quickly with no humming or grinding of metal
- Water drains from the sink freely while the disposal runs
- The reset button stays in after several uses
- No water leaks under the sink around the disposal or drain pipes
When to stop and call a professional
- The disposal keeps tripping its reset button or tripping the breaker
- Water is leaking from the body of the disposal (the internal seals have failed; the unit usually needs replacing)
- You smell burning or see scorch marks on the unit, cord or outlet
- The flywheel turns freely and power is present, but the motor only hums
- The unit is hardwired and you suspect a wiring or switch fault
- Something is stuck that you can’t remove with tongs and the hex key
How to prevent it
- Always run a strong flow of cold water before, during and for a few seconds after grinding.
- Keep bones, pits, shells, fibrous peels, grease, coffee grounds in quantity, pasta and rice out of the disposal.
- Feed food in gradually rather than all at once.
- Use a sink strainer or keep the splash guard in place so cutlery and caps can’t fall in.
- Run the disposal regularly, even briefly, to prevent rust and seizing.
Frequently asked questions
Why is my garbage disposal humming but not spinning?
Humming means the motor is getting power but the flywheel can’t turn, almost always because something is wedged in it. Turn it off straight away, cut the power, and free the flywheel with the hex key on the bottom.
Where is the reset button on a garbage disposal?
On most units it is a small red button on the bottom of the disposal, near the hex socket, or low on the side. It pops out when the motor overheats. Press it firmly until it clicks and stays in.
Is it safe to put my hand in the garbage disposal if it’s unplugged?
No. Even unplugged, the grind ring has sharp edges and objects can be wedged in awkward positions. Always use tongs or pliers. Keeping your hand out is a habit worth building for every repair.
Can I use drain cleaner in a garbage disposal?
It isn’t recommended. Chemical cleaners can damage seals and pipes, and if you later need to work on the disposal or unclog the drain, you risk getting caustic liquid on your skin or in your eyes. Clear jams mechanically instead.
How do I know if my garbage disposal needs replacing?
Replace it if it leaks from the body, keeps tripping even with no jam, hums with the flywheel turning freely, or is badly rusted. Repairing internal parts is rarely worth it compared with a new unit.
This guide is general information, not professional advice. Homes differ, so follow your product manuals and local codes. If anything looks different from what's described, or you feel unsure, stop and call a qualified professional. In an emergency, leave the area and call your local emergency number.
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