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Repair guide · Easy · 10 minutes

Garbage Disposal Humming or Jammed

A humming disposal almost always means the motor is stalled against a jam, and the fix is a reset button and a 1/4 inch hex key. Ten minutes, no parts to buy. Here is how to do it safely, and the signs the motor is actually done.

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Garbage Disposal Humming or Jammed

What You Need

Know These Parts Before You Start

The disposal, under the kitchen sink
The disposal, under the kitchen sink
The red reset button, on the bottom of the unit
The red reset button, on the bottom of the unit
The hex socket, dead center on the bottom
The hex socket, dead center on the bottom

The Fix, Step by Step

  1. Cut the power

    Unplug the disposal under the sink. If it is hardwired, flip its breaker. A humming disposal has a live motor pushing against the jam, so this step comes before anything else. Then leave the switch alone until step four.

  2. Pull out what you can see

    Shine the flashlight down the drain and lift out anything visible with tongs or pliers. The usual suspects are fruit pits, bottle caps, and bones. In San Diego kitchens we also pull out a surprising number of avocado pits.

  3. Turn the flywheel with the hex key

    Under the sink, insert the Allen wrench into the hex socket at the bottom center of the unit. Work it back and forth until it swings a full turn freely in both directions. You are manually rotating the plate the jam is wedged against, and freeing it is the whole repair.

  4. Reset and test

    Press the red button on the bottom of the unit until it clicks and stays in. Restore power, run cold water, and flip the switch in a short burst. If it spins, let the water run about 30 seconds to flush the chamber, and you are done.

Stop and call us if: it still hums after the hex key turns freely and the reset clicks, it trips the breaker again, it is leaking from the bottom of the unit, or you smell burning. A bottom leak means an internal seal has failed and the unit needs replacing, and a motor that hums through a clear chamber is seized. Disposals last 8 to 12 years, so if yours is in that range, put the money toward the new one.

Cleared the jam and it still hums?

Call and describe it. We will tell you what it likely is, what it usually involves, and how soon we can be there.

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What Customers Say About Paws Plumbing

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Josh SullivanPosted on Google
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