A humming garbage disposal usually means the motor is running but the blades are stuck

When your garbage disposal hums but does not grind, the motor is turning on and the electrical circuit is working—but something is blocking the impellers (the spinning parts that break up food) from moving. The disposal will not shut off on its own, so you need to stop it before you can clear the jam. This is fixable without calling a plumber in most cases, but it requires you to work safely around the drain opening.

A humming disposal is different from a disposal that makes no sound at all (which usually means a tripped breaker or a burned-out motor). It is also different from a disposal that grinds noisily but still drains—that one is working, just loudly. A hum with no grinding means the jam is blocking the impellers completely.

Key Takeaways

  • Turn off the disposal at the wall switch and flip the breaker to the off position before you put your hand near the drain.
  • Use a flashlight to look down into the drain and spot what is jamming the impellers—usually a bone, utensil, or fibrous food like celery or corn husks.
  • Remove the jam with needle-nose pliers or a wooden spoon handle, never your fingers, even though the motor is off.
  • Run water and test the disposal on low speed for a few seconds before returning to normal use.
  • If the disposal still hums after you clear the jam, the motor may be damaged and you will need a replacement.

Turn off power at both the switch and the breaker

Before you do anything else, flip the wall switch to the off position. This stops the motor from running, but it does not cut power to the unit entirely. Next, go to your electrical panel (usually in a basement, garage, or utility closet) and flip the breaker that controls the garbage disposal to the off position. The breaker is typically labeled "Kitchen" or "Disposal" and is usually a 15-amp or 20-amp switch.

This two-step shutdown is important because a disposal can restart if someone flips the switch while you are working. Turning off the breaker prevents that. If you are not sure which breaker controls the disposal, flip the switch off, go to the panel, and flip breakers one at a time until the disposal light or outlet stops working. Mark that breaker with tape so you know it next time.

Look into the drain with a flashlight to find the jam

Shine a flashlight down into the drain opening. You are looking for anything solid that is wedged between the impellers or stuck to the drain walls. Common culprits are chicken bones, fish bones, fruit pits, metal utensils (forks, spoons, knife tips), glass, plastic, and fibrous foods like celery stalks, corn husks, or onion skins. Write down what you see—it helps you avoid the same jam later.

If you cannot see anything from above, the jam may be deeper in the drain or in the trap (the curved pipe under the sink). If the drain is completely dark, angle the flashlight so the beam goes straight down and wait a moment for your eyes to adjust. Do not reach into the drain yet, even though the power is off.

Remove the jam with pliers or a wooden tool

Use needle-nose pliers or a pair of tongs to grab and pull out whatever is blocking the impellers. Grip it firmly and pull straight up and out. If the object is wedged tightly, wiggle it gently side to side as you pull. Do not force it so hard that you bend the impellers or damage the drain walls.

If the jam is a fibrous food like celery or corn husks, you may need to pull it out in pieces. If it is a bone or pit, pull it out whole. If you cannot reach it with pliers, try using the handle of a wooden spoon or a wooden dowel to push it loose, then grab it with pliers. Never put your fingers into the drain, even though the power is off—the opening is sharp and the impellers can still cause injury if the breaker is accidentally flipped.

Once you have removed the jam, look into the drain again with the flashlight to make sure nothing else is stuck. Run your fingers along the inside walls of the drain opening (from above, not reaching in) to feel for any small pieces you may have missed.

Test the disposal before returning to normal use

Flip the breaker back to the on position. Go to the sink and turn on the cold water. Flip the disposal switch to the on position for just two or three seconds, then turn it off. Listen for grinding sounds and watch the drain to see if water is flowing. If the disposal grinds and drains normally, turn it on again for a full cycle (about 10 to 15 seconds) while water runs.

If the disposal still hums and does not grind, turn it off when ready, flip the breaker back to off, and look into the drain again. There may be a second jam you did not see the first time. If you have cleared all visible jams and the disposal still only hums, the motor itself may be damaged and the unit will need to be replaced.

Why the jam happened and how to prevent it

Garbage disposals are designed to break down soft food scraps, not hard objects or fibrous materials. Bones, pits, shells, and utensils should never go into the disposal. Fibrous foods like celery, corn husks, and onion skins can wrap around the impellers and jam them. Grease and oil can harden inside the drain and trap food particles.

To avoid future jams, scrape plates into the trash before rinsing them. Do not pour grease down the drain—let it cool and solidify, then throw it away. Cut fibrous vegetables into small pieces if you must put them down the disposal, or throw them in the trash. Run cold water while the disposal is on and for 10 to 15 seconds after you turn it off to flush debris through the trap.

When to call a plumber instead of fixing it yourself

If the disposal still hums after you have cleared the jam, or if you cannot see or reach the jam, stop and call a plumber. A humming motor that does not grind after the jam is cleared usually means the motor is burned out or the impellers are bent, and the unit needs to be replaced. Trying to force the impellers to turn can damage them further.

If water is backing up into the other sink or if you smell sewage, the jam may be in the trap or the drain line below the disposal, not in the disposal itself. A plumber has the tools to clear those blockages safely. If you are not comfortable working around the drain or the electrical panel, call a professional—it is not worth the risk of injury.

Frequently Asked Questions

Can I use a plunger to clear a jammed garbage disposal?

No. A plunger can push the jam deeper into the drain or damage the impellers. Always turn off the power and use pliers or a wooden tool to pull the jam out from above. If the jam is too deep to reach, call a plumber.

Is it safe to put my hand in the disposal if the power is off?

No. Even with the power off, the drain opening has sharp edges and the impellers can cause injury. Always use pliers, tongs, or a wooden tool to remove jams. Keep your fingers out of the drain.

What should I do if the disposal hums but I cannot find a jam?

The jam may be in the trap or deeper in the drain line. Turn off the breaker, wait 30 minutes, then turn it back on and try running the disposal again for a few seconds. If it still only hums, stop and call a plumber. Do not keep running it—you may damage the motor.

Can I fix a burned-out garbage disposal motor myself?

No. If the motor is burned out, the disposal needs to be replaced. A plumber or handyperson can remove the old unit and install a new one, which usually takes one to two hours. This is not a DIY repair.

How long should I run the disposal after clearing a jam?

Run it for 10 to 15 seconds with cold water flowing. This flushes any remaining debris through the trap and into the drain line. Do not run it longer than necessary—it uses electricity and wears the motor.