Fix it
Why is my garbage disposal humming but not spinning?
A hum with no grind means the motor has power but the plate cannot turn — something is wedged, or the bearings have seized. The hum is also a countdown: a stalled motor overheats and trips its own breaker within seconds.
What it usually is
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An object jamming the impeller plate
A fruit pit, bone shard or stray utensil wedged between the spinning plate and the grind ring is the cause in the vast majority of hums. Fibrous stringy scraps wrap and bind the same way.
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The overload tripped from a previous jam
If it hummed earlier and now does nothing, the red reset button underneath has popped — the motor protected itself.
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Seized bearings on an aging unit
No visible obstruction, wrench test immovable with nothing wedged, and a history of slow starts point at the bearings — the unit is done.
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Rust bonding the plate after disuse
A disposal unused for weeks can bond lightly with surface rust; it often breaks loose with the wrench and runs normally after.
What you can check yourself
Power off — unplug it or trip the breaker, non-negotiable. Never put a hand in. Use the hex wrench that came with the unit (or a 1/4-inch Allen) in the socket at the bottom center and rock the plate loose; tongs retrieve whatever it drops. Press the red reset, restore power, run cold water and test.
When it’s a job for a pro
A disposal that jams monthly, trips its overload routinely, or will not turn with the wrench and nothing wedged is at end of life. Replacement is quick work for a plumber, and worth pairing with a check of the mounting and drain connections.
The wrench fix costs nothing. Replacement disposals typically run $250 to $600 installed depending on horsepower and mounting.
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