Illustrated view from inside an under-sink cabinet looking straight up at the bottom face of a garbage disposal canister; the hex socket sits at the center of the bottom face highlighted in gold, and a small red reset button is offset from center on the same bottom face.
Appliance · 10 minutes · Beginner

Disposal hums but won't turn. The fix takes 5 minutes.

Updated May 2026 Tools: ¼" hex wrench Typical cost: $0–$10

Garbage disposals jam constantly. A peach pit, a chicken bone, a fork that fell in. The motor's fine, the blades are just stuck. There's a hex socket on the bottom of every disposal exactly for this. Don't call a plumber.

Critical safety rule: Turn off the disposal at the switch and unplug it under the sink before putting your hand anywhere near it. Even a "broken" disposal can suddenly start spinning once you free the jam.

Step 1: Find the hex socket on the bottom

Get under the sink with a flashlight. On the bottom center of the disposal unit, there's a recessed hex socket, usually ¼". This is designed exactly to manually rotate the blades and free a jam.

Step 2: Rotate the blades

Insert the hex wrench (most disposals come with one; check the bracket under the sink) and turn it back and forth. You'll feel resistance, then a sudden release as whatever's stuck breaks free. Keep rotating both directions until the blades spin freely.

Step 3: Remove the debris

Whatever was jamming the disposal is still in there. Use tongs or long-handled pliers (never your fingers) to pull it out from the top.

Step 4: Reset and test

Find the red reset button on the bottom of the disposal (different location from the hex socket; usually a small red button). Press it. Plug the disposal back in, turn on the switch, and run cold water. It should now run normally.

If it still hums and won't turn

  • Re-jam: Sometimes a piece of debris falls back into the blade path. Repeat Steps 1–3.
  • Motor failure: If you can rotate the blades freely but the motor still won't turn under power, the motor is likely shot. At that point, replacement ($100–$200) is usually more cost-effective than repair.
Jam, or a dead motor? If you're not sure whether this is a five-minute unjam or a worn-out motor, show Jin before you buy a new disposal. One photo and it tells you which one you're dealing with. Install the free alpha.

Parts and tools

  • ¼" hex wrench / Allen key (any brand, InSinkErator's "Jam-Buster" works too) Find on Amazon →
  • Replacement disposal (½ HP, only if the motor itself is dead, not just jammed) Find on Amazon →
  • Long-handled tongs or pliers (anything 10"+, keep your fingers out of the chamber) Find on Amazon →

Amazon links above are affiliate links. If you buy through them, SokoJin earns a small commission at no extra cost to you. Full disclosure.

How to not jam it again

  • No fibrous foods (celery, corn husks, artichokes). They wrap the blades.
  • No bones, fruit pits, or shells.
  • Always run cold water for 15 seconds before, during, and after.
  • If you hear something change in pitch, stop immediately and check.

Stop and call a pro if you see this

  • Water dripping from the underside of the disposal canister, usually a cracked grinding chamber. Replace, don't repair.
  • A burning electrical smell from the motor housing.
  • The motor still hums after you've manually rotated the blades free, windings are likely shot.

Wish you had a sidekick under the sink?

Jin's pretty handy in a tight cabinet. Install the free alpha and point your camera at it.

Install the free alpha →