Why did my garbage disposal stop working and hum?

A humming garbage disposal usually means the motor is jammed. Learn how to safely unjam it with an Allen wrench or reset the overload protector.

Category:Electrical

Difficulty:Easy

Time:10 min

Success:50%

Updated:Jun 15, 2026

quick_referenceQuick Answer

For Why did my garbage disposal stop working and hum?, start with "Turn off power and check for jam": Unplug the disposal or turn off the breaker. Insert a 1/4-inch Allen wrench into the hex hole at the bottom center. Rock it back and forth to free the flywheel. Stop DIY if the disposal leaks water from the bottom after unjamming. This is listed as a easy recovery and usually takes about 10 min.

verifiedGuide Snapshot

Repair areaElectrical

Estimated time10 min

DifficultyEasy

Stop conditions3

Last updated Jun 15, 2026. Review the stop conditions before continuing.

account_treeRecovery State

DeviceGarbage Disposal

Current stateNo Operation

Specific stateMotor Hums

Failed stepFlywheel Jam

Likely failure typeMechanical Jam

DIY boundaryDIY recovery first

paymentsCost decision

help1. Understand the Problem

When you flip the switch and hear a hum but no grinding, the disposal motor is getting power but the impeller is stuck. This is often caused by a foreign object like a bone or utensil jamming the flywheel. The disposal has a built-in overload protector that trips to prevent motor damage.

build_circle2. Try This First

Best First Step

Turn off power and check for jam

Unplug the disposal or turn off the breaker. Insert a 1/4-inch Allen wrench into the hex hole at the bottom center. Rock it back and forth to free the flywheel.

visibility3. Visual Guidance

See what's happening and how to try the first recovery step.

Press the reset buttonAfter freeing the flywheel, locate the red reset button on the bottom or side of the unit. Press it firmly until it clicks.

Check for foreign objectsUse a flashlight and tongs (never your hand) to look inside the disposal chamber. Remove any bones, silverware, or glass shards.

Test operation with waterTurn power back on, run cold water, and flip the switch. Listen for a smooth grinding sound. If it hums again, repeat the Allen wrench step.

autorenew4. If That Doesn't Work

Try the next recovery options.

Replace the disposal unitIf the motor is burned out or the reset button won't hold, a full replacement may be faster and cheaper than professional repair.

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Frequently Asked Questions

Why does my disposal hum but not spin after I press reset?expand_more

The motor is still jammed. Use the Allen wrench to manually rotate the flywheel. If it turns freely but still hums, the motor capacitor may be dead.

Can I use my hand to unjam the disposal?expand_more

Never put your hand inside a disposal. Always use tongs or pliers. Even with the power off, sharp blades can cause serious injury.

How often should I press the reset button?expand_more

Only when the disposal has stopped working and hums. Frequent resetting indicates a recurring jam or an aging motor that should be replaced.

Will ice cubes help sharpen the blades?expand_more

Ice cubes can help dislodge greasy buildup but don't sharpen blades. Run a few cubes with citrus peels to freshen and clean the chamber.

What if my disposal doesn't have a hex hole?expand_more

Some models have a manual flywheel access port on the side. Check your manual. If none exists, you may need to remove the disposal to access the motor shaft.