Garbage disposal hums but won't spin: 4 causes, cheapest first
A hum means power is reaching the motor and the motor can't turn. That's usually good news: it's a jam, not a dead unit. Stop running it. Every extra second of hum heats the winding and trips the overload.
Jam in the grind chamber (free, most common). Kill the power at the wall switch or the breaker. Look in with a flashlight, no fingers. If there's a hex socket under the unit, put the ΒΌ in hex wrench that came with it in and rock it both ways until the plate turns. No wrench? A broom handle from the top, prying the round plate, gives more leverage than the wrench does.
Overload tripped (free). Once the plate turns freely, press the red reset button on the bottom. Then cold water running, power on, run it.
Seized flywheel or bearings (replace). Plate won't move even with leverage, or it spins free and still hums: the motor is done.
Failed start capacitor (replace on most units). Hums, never turns, even free and reset.
Two rules: never hot water into a disposal, never your hand in. If none of these fit, tell me what it does and I'll name the one next thing to check. Reply here or [email protected]
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