Why is my garbage disposal humming but not working?

A humming disposal that won't spin has something jammed in the flywheel — usually a bone, bottle cap, or utensil. The hum is the stalled motor trying to turn. Cut power, clear the jam, use the hex-wrench port on the bottom to free the plate, and it usually lives. A disposal that leaks from the bottom or keeps tripping its reset is done: replacement, not repair.

Likely causes

• Jammed flywheel — Hard debris locks the plate; the hum is the stalled motor.
• Tripped reset or breaker — The disposal's own overload switch pops to protect the motor — that version is silent, no hum.
• Worn seals (leaking from the bottom) — Bottom leaks mean the internal seal failed — disposals aren't rebuilt; replace.
• Dead motor — No sound at all with power confirmed — the unit has failed.

What you can check yourself

• Power OFF at the switch and breaker. Never reach inside with your hand — use tongs or pliers to fish debris out through the drain opening.
• Insert an Allen wrench (usually 1/4 inch) in the hex socket on the unit's bottom and work it back and forth to free the jam.
• Press the red reset button on the bottom, restore power, run cold water, and test.

Typical cost

A plumber's repair visit in Los Angeles, CA typically runs $150–$300 if it's just a jam or reset. Disposal replacement runs $250–$600 installed depending on horsepower and brand.

When to call a pro

Leaks from the bottom of the unit, repeated breaker trips, or a jam you can't free — call. Water plus a failing electrical appliance under the sink is not a wait-and-see.

Plumber pros in Los Angeles, CA

• One Star Inc · 742 S Hill St Ste 310, Los Angeles, CA · 12136221055
• Bill & Sons plumbing · 334 Main St, Los Angeles, CA · +12136423800
• Precision Emergency Plumber Los Angeles · 412 Colyton St, Los Angeles, CA · +12134516567
• Mr. Marcus Plumbing · 351 E Temple St, Los Angeles, CA 90012, United States, Los Angeles, CA · +13233287922
• Ok Plumbing, Inc. · 720 E 2nd St, Los Angeles, CA · 12136266211
• DL Plumbing · 1254 W 6th St # 700, Los Angeles, CA · (888) 487-3969
• Prime Leak Detection · 601 S Figueroa St # 4050, Los Angeles, CA · 18883401380
• Sun Trim · 2011 S Santa Fe Ave, Los Angeles, CA · 12136225066

Get free quotes from Los Angeles, CA pros →

Data by Servik — verified local pros from official license records and public sources. Cost figures are typical ranges, not quotes; a pro's written estimate is the real number.