Garbage Disposal Not Working? 3 Quick Fixes Before Replacing

Updated April 2026 · 4 min read

Flipped the switch and… nothing? Or a hum with no grinding? 85% of "broken" garbage disposals are either jammed or tripped, and both are 2-minute free fixes. Here's the checklist in order of likelihood.

Fix #1: It's humming but not spinning (jam — 60% of cases)

If you hear a hum when you flip the switch but nothing moves, the motor is working but something is physically blocking the blades. Common culprits: a bone, fruit pit, piece of silverware, or bottle cap.

1. Flip the switch off. Don't let it hum for more than 3 seconds — you'll burn out the motor.
2. Unplug the disposal under the sink, or flip the breaker for the kitchen.
3. Shine a flashlight down into the drain. You may spot the obstruction.
4. Use tongs to remove visible debris. Never your hands.
5. Find the hex slot on the bottom center of the disposal.
6. Insert a 1/4 inch Allen wrench and turn it back and forth — clockwise, then counter-clockwise. You'll feel it start to move freely.
7. Press the reset button (red button on bottom of unit).
8. Plug back in, run cold water, and test.

Fix #2: Complete silence (tripped breaker or overload switch — 25% of cases)

If the switch produces no sound at all — no hum, nothing — power is the issue.

• Press the reset button on the bottom of the disposal. If it was already out, push it in. This is the most common silent-disposal fix.
• Check your electrical panel for a tripped breaker. Reset it if so.
• Test the wall switch if there is one. Occasionally the switch itself dies.
• Check the outlet under the sink by plugging something else in — sometimes the outlet has its own reset button (GFCI).

Fix #3: Leaking from the bottom (25% of time when leaking — replace)

Disposals leak from three places:

• Top (sink flange): Plumber's putty has failed. Disassemble and re-putty — moderate DIY.
• Sides (discharge hose connection): Tighten the clamp or replace the hose.
• Bottom: The internal seal has failed. This is not repairable — replace the disposal. Plan for $150–$250 for a quality unit and 45 minutes of DIY labor.

When to replace instead of repair

• Frequent jams despite careful use.
• Leaks from the bottom shell.
• Motor runs but grinding has slowed noticeably.
• Loud grinding or rattling on every use — bearings are failing.
• Water backing up and not draining even after plunging.

Things you should NEVER put in a disposal

• Bones, fruit pits, corn cobs, shells
• Fibrous vegetables — celery, asparagus, artichoke leaves, onion skins
• Potato peels (become glue), pasta/rice (swell and clog)
• Coffee grounds (sludge up over time)
• Grease or oil (solidifies in pipes)
• Egg shells (controversial — the thin membrane can wrap around shaft)

Frequently asked questions