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 Boston, MA 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 Boston, MA

• Plumbing Prime · 60 State St Ste 700, Boston, MA · (857) 366-4230
• Beacon Hill Plumbing & Heating · 56 Myrtle St, Boston, MA · 6177233296
• 24 HR Emergency Plumber Boston · 98 N Washington St #332, Boston, MA · (617) 683-1871
• Best Plumbers club · service area, Boston, MA · (877) 910-5119
• Primetime Boston Plumbers · 127 Tremont St, Boston, MA · +16179368955
• Kross Plumbing · 1 Washington Mall Ste 1083, Boston, MA · 18573995033
• T Flow Plumbing Repair · 607 Boylston St, Boston, MA · +16178181229
• Next Step Removal & Installs · 457 Cambridge St, Cambridge, MA · +16176378387

Get free quotes from Boston, MA 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.