Garbage Disposal Humming But Not Working
A humming garbage disposal is getting power but the grinding plate is jammed. Turn it off immediately — leaving it humming burns the motor out — then free the jam with the hex wrench from underneath.
Before you start: Switch the disposal off at the breaker before putting any tool into the chamber, and never reach in with your hand. Do not leave a humming unit running — the motor overheats within seconds.
Causes, in order of likelihood
| Cause | How often | Typical cost |
|---|---|---|
| Jammed impeller or grinding plate | Most common | DIY |
| Object lodged against the shredder ring | Common | DIY |
| Seized bearings after a long jam | Less common | $200–$450 installed |
1. Jammed impeller or grinding plateYou can check this
How to check: A hum with no rotation, almost always after bones, fruit pits, fibrous peel or cutlery.
The fix: Switch off at the breaker. Insert the hex wrench supplied with the unit into the socket in the centre of the base and work it back and forth until it turns freely. Remove the debris, then press the reset button.
2. Object lodged against the shredder ringYou can check this
How to check: Shine a torch into the chamber. Metal or glass fragments are usually visible.
The fix: Remove it with tongs or pliers — never by hand — with the power off at the breaker.
3. Seized bearings after a long jamTechnician job
How to check: The wrench will not turn the plate even with the chamber clear.
The fix: Replace the disposal.
When to call a technician
If the plate will not turn with the wrench, the unit has seized and needs replacing.
Describe the fault and get matched with an independent appliance technician in California.
Call (844) 659-0046