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Garbage Disposal Troubleshooting

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PROBLEM: Stuck Flywheel (humming sound)
Garbage Disposal Wrench Hole

Garbage Disposal Wrench Hole


PROBLEM:
Stuck Flywheel / Disposal Will Not Run (makes a humming noise)

If the garbage disposal won't turn on but makes a humming sound when you flip the switch, it won't do that for long. That means you have a stuck flywheel and the reset button on the unit itself or the fuse or circuit breaker in your electrical service panel will trip and turn off very quickly. The flywheel is stuck because something is lodged between it or the impeller(s) and the shredder ring.

(See Anatomy of a Garbage Disposal).

  • To start the repair, turn off power to the garbage disposal at the electrical service panel.
  • Reminder: Don't ever put your hand down into the garbage disposal hopper (grinding chamber).
  • Take the offset wrench that came with the disposal unit and insert the wrench into the flywheel turning hole in the bottom of the unit. If you don't have the wrench you can pick one up from the hardware store that sells your garbage disposal.
  • Once the wrench is inserted, turn it clockwise to dislodge the stuck impeller or flywheel. When it dislodges, you'll feel the flywheel turn freely.
  • Another approach is to try and use a wooden broom-handle or similar wooden object to free the stuck impeller and flywheel from the top of the unit through the drain.
  • Place the broom-handle into the hopper and against an impeller. Use leverage to try and free the stuck flywheel. As before, when it dislodges you'll feel the flywheel turn freely.

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Related Video
Replace a Garbage Disposer
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