Garbage disposal is jammed or just hums

A disposal that hums but won't turn is almost always a simple jam — usually a free, five-minute fix, and rarely a dead unit.

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Select anything that matches and the checklist below reorders to fit. Not sure? Skip it.

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In Canada, a disposal that hums but won't spin is almost always jammed. Switch it OFF at the wall switch — do not just rely on the disposal being "off" — then look and listen. To confirm and free it, fit the hex (Allen) wrench into the socket in the centre of the unit's underside and work it back and forth; the object usually breaks free. Never reach into the disposal with your hand. Read the safety note before you start.

Ranked from real-world failure data. The order updates as you select what you’re noticing above.

Likely causes, in the order to check them

Showing the typical order

Beginner-friendly Doable, with care Safety-critical Call a pro

visibilityHow to check for a jam

report Never put your hand into the disposalThe single rule that matters here: your hand never goes into the disposal, even when it is "off." Switch it OFF at the wall first and leave it off the whole time. Free the jam with the hex wrench in the bottom socket, or lift visible objects out from above using wooden tongs or pliers — never fingers. The blades are blunt but the impeller can snap around with real force if power returns. If any of this makes you uneasy, freeing a jam is a quick job for a plumber or appliance tech.

Switch the disposal OFF at the wall switch and leave it off. A humming disposal is still trying to run — treat it as live until the switch is off.
Shine a flashlight down into the drain opening from above. Look for a bone, pit, or piece of cutlery wedged against the grinding plate. Never put your hand in — use wooden tongs or pliers to lift out anything you can see, from above only.
Find the hex (Allen) socket in the centre of the unit's underside — many disposals ship with the matching wrench clipped nearby. Fit the wrench and rock it firmly back and forth. Feeling it break free and turn a full circle means the jam is cleared.

buildhex-wrenchbuildflashlight schedule8 min

handymanHow to fix it

With the disposal switched off at the wall, remove any visible object from above with tongs, then work the hex wrench in the bottom socket back and forth until the flywheel turns freely. Restore power, press the reset button, and run cold water while you test it.

Switch the disposal OFF at the wall and leave it off. Do not reach in with your hand at any point.
From above, use wooden tongs or pliers to remove anything you can see wedged in the opening.
Fit the hex wrench into the socket in the centre of the underside and rock it firmly back and forth until the flywheel spins a full, free turn in both directions.
Press the red reset button on the underside back in, restore power at the wall, run cold water, and switch the disposal on to confirm it spins cleanly.

schedule10 min savingsusually free

Disposal jam-clearing hex wrenchA 1/4" hex (Allen) key fits most units; check the socket size in the base if yours differs

verifiedWhy this one goes to a pro

A seized or burned-out disposal is replaced, not repaired, and doing it safely means disconnecting live wiring and the drain, then leak-testing the reassembly. Because it touches both the electrical circuit and the plumbing, it is a job for a licensed appliance tech, plumber, or electrician — and in some provinces the electrical side must be done by a licensed electrician. Confirm your local rule before starting.

gavel Check your province first AB: homeowner may do this · BC: homeowner may do this · ON: permit + inspection required · PE: homeowner may do this · QC: licensed professionals only
Owner replacement of a plug-in disposal is generally permitted; a hardwired unit's electrical connection may be restricted — confirm the provincial rule.

Your notes travel with the request — what you saw, what you ruled out, when it started — so the pro arrives with a head start instead of a mystery.

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Why the list is in this order

We don’t sort by likelihood alone. We sort the way a good, honest tradesperson thinks: rule out the free, safe, common causes first. That’s why the cheap checks outrank the expensive repairs — and why anything dangerous gets a hard stop instead of a pep talk. The order exists to save you money, not to sell you anything.