How to Reset and Unjam a Garbage Disposal

Published Read 8 min read

On this page

Most disposals that hum, trip, or go quiet are recoverable right at the sink, and the recovery follows a fixed order: cut the power, reset the cooled motor, free a stuck flywheel from below or above, lift the object out, and prove the repair on cold water. A tripped overload protector and a jammed flywheel are the two faults this sequence handles, and both bend to the same rule that never does: the unit is off and its power is cut before anything goes into the chamber. This guide walks that order start to finish, from killing power to the confirming test run. If you have not yet worked out whether you are dealing with a power problem or a jam, our guide on why a disposal won’t turn on or is humming (046) sorts that first.

Before You Touch It: Switch Off and Cut the Power

Cut the power before anything else, because the motor can be energized and straining even when the unit looks dead still. Flip the wall switch or air switch to off. If the disposal is plugged into an outlet under the sink, unplug it. If it is hardwired, turn off its breaker in the electrical panel. InSinkErator and Moen both open their unjamming instructions with this step for a reason: a stalled motor is still drawing current and pushing against the jam, so a flywheel that feels frozen can kick over hard the second the circuit closes again.

Switching off at the wall is not the same as cutting power, which is why both matter. A wall switch interrupts the circuit, but a momentary slip back to on while your hand is near the opening is exactly the scenario the off-and-unplugged rule exists to prevent. When you can confirm the unit is both switched off and either unplugged or breaker-cut, you have removed the only real hazard in this job. Everything after this point is mechanical and slow. The grinding components are blunt, not bladed, but they are heavy and motor-driven, so the precaution stands regardless.

Press the Reset Button (and Wait for the Motor to Cool)

If the disposal went completely silent, start with the reset button on the bottom of the unit before assuming a jam. The button is a small red square in the center underside of most household disposals. When the thermal overload protector trips, usually after the motor has stalled or run too long, the button pops out and sits proud of the housing by a noticeable step, which InSinkErator measures at roughly 5 mm on its units.

With the wall switch off, press the button gently and firmly until it stays in and sits flush. If it will not stay in, the motor has not cooled enough yet. InSinkErator’s instruction is to wait ten minutes and try again, and to allow up to 20 minutes of cooling on units triggered by a wall switch or air switch. Moen gives a similar ten to fifteen minute window. Forcing a button that keeps popping back out will not help, because the protector is doing its job and refusing to let a hot motor restart.

A reset that holds, followed by a unit that still only hums, points you straight at a jam. That is the next section. A reset that holds and then runs normally means you are done after a test run, with no need to open anything from below or above.

Freeing the Flywheel With the Hex Wrench From Underneath

Use the bottom hex socket when the disposal hums but will not spin, since that signature means the flywheel is jammed rather than dead. On the underside of the unit, dead center and facing the floor, there is a hex-shaped hole machined into the motor shaft. InSinkErator ships a service wrench with each unit, but the socket takes a standard 1/4-inch Allen wrench, so any 1/4-inch hex key works if the original is lost.

Seat the wrench fully in the socket and work it back and forth in both directions. The goal is to rock the stuck flywheel until whatever wedged it shifts loose. If it resists, you can apply some force. The wrench is designed to flex before it damages the disposal, so a stubborn turn is expected rather than a warning sign. Keep working it clockwise and counterclockwise until the wrench spins in complete, free circles in both directions. That free rotation is the signal the flywheel is no longer bound. Waste King describes the same check from the bottom shaft, so the method holds across the common continuous-feed brands. Once it turns freely, the object that caused the jam is loose in the chamber and ready to come out, which the retrieval section covers.

Rocking It Loose From Above With the Wrenchette

Use the offset wrenchette from above when your disposal has no bottom socket or you cannot reach underneath comfortably. Some units, including many Moen models, are freed from the top instead of the bottom. The tool is a flat offset wrench, sometimes called a wrenchette or jam-buster wrench, that drops down through the sink opening.

With power still cut, lower the wrenchette through the drain and rest it flat on the floor of the turntable. Moen’s guidance is to set the two ends so they sit diagonally and catch against the two swivel impellers, then turn the wrench clockwise or counterclockwise to rotate the turntable through at least two full revolutions, which confirms the jam has released. If you do not have the manufacturer’s wrenchette, the back of a sturdy wooden spoon or a short broom handle can give the turntable the same nudge from above, a method Waste King points to for checking whether the turntable will rotate. Use wood rather than metal so you do not chip the grind components, and never use your hand to push the turntable around.

Retrieving the Stuck Object Safely With Tongs, Never Your Hand

Pull the object out with tongs or pliers, never with your fingers, even after the flywheel turns freely. Once the jam releases, the culprit is usually sitting in the chamber: a bottle cap, a chunk of bone, a fruit pit, a twist tie, or a stray piece of cutlery that fell in unnoticed. A flashlight aimed down the drain will show it. Reach in with kitchen tongs, long-handled needle-nose pliers, or a similar grabber, and lift the object clear.

This is the point where the off-and-unplugged rule earns its keep. The chamber holds blunt, heavy parts on a motor that may still be primed to spin, so a hand in the opening is the one move that turns a simple fix into an injury. Both InSinkErator and Moen state the rule plainly in their own instructions: do not place your hand in the disposal, and remove debris with tongs or pliers. If the object is wedged in a way tongs cannot grip, do not improvise with your hand. Work the wrench again to shift it, or treat the unit as a job for a professional rather than risk the chamber. The diagnosis of which foods and items cause these jams in the first place lives in our guide on what you should never put in a disposal (048).

Restoring Power and Test-Running With Cold Water

Restore power only after the chamber is clear and your hands and tools are out, then test with cold water running. Plug the unit back in or flip the breaker on, and reset the button once more if it popped during the work. Turn on a steady stream of cold water at the sink first, then switch on the disposal. InSinkErator’s use guidance is to run cold water during grinding, because cold water keeps fats firm so they wash through the drain rather than coating the pipe, and to let the water run a few seconds after the unit stops to flush the line.

A disposal that spins up smoothly and clears the water without humming or stalling is fixed. Let it run empty for several seconds to confirm it holds, then shut it off and let the water flush behind it. If it hums again, stalls again, or trips the reset a second time within a few uses, the problem is no longer a one-time jam. A motor that keeps overloading after a correct unjam, a unit that will not reset at all, or any sign of an electrical fault is past a DIY recovery. At that stage the decision shifts from fixing the jam to judging whether the unit is worth keeping, which our guide on repairing vs replacing a disposal (050) walks through, and any hardwired electrical fault belongs to a licensed plumber or electrician rather than another reset.

A clean reset and a free-spinning flywheel cover the large majority of disposals that hum, trip, or go quiet. The recovery is short once the order is right: power off, reset and cool, free the flywheel from below or above, lift the object out with tongs, then restore power and prove it on cold water. The one habit that keeps every future jam safe is the same one that opened this guide: cut the power and confirm it before a wrench, a tool, or a hand ever goes near the opening.

This article is general information, not professional advice. For any unit with an electrical fault, a motor that keeps overloading, or a disposal that will not reset, consult a licensed plumber or electrician.

Sources

InSinkErator Support, Fixing a Jammed Garbage Disposal (switch off, 1/4-inch wrench in bottom socket, back-and-forth, red button drops 5mm, wait ten minutes, tongs/pliers, water then disposal): https://support.insinkerator.com/app/answers/detail/aid/515/~/fixing-a-jammed-garbage-disposal
InSinkErator Support, Resetting a Garbage Disposal (switch off first, cool up to 20 minutes, press reset, wait ten minutes if it will not stay): https://support.insinkerator.com/app/answers/detail/aid/516/~/resetting-a-garbage-disposal
InSinkErator, How To Use a Garbage Disposal (run cold water during grinding, flush a few seconds after): https://www.insinkerator.com/en-us/kitchen-better/how-to-use-a-garbage-disposal
Moen Solutions, How to Unjam a Garbage Disposal (unplug or cut power, wrenchette from the top against the swivel impellers, two full revolutions, tongs or needle-nose pliers, never hands, press reset): https://solutions.moen.com/ArticleLibrary/HowtoUnjamaGarbageDisposal
Waste King Support, Garbage Disposal FAQs (shut off power, check turntable from the top with a wooden spoon or unjamming wrench, or hex wrench at the bottom shaft): https://www.wasteking.com/support/faq

Related posts:

  1. How a Garbage Disposal Works Most people picture a garbage disposal as a set of fast spinning blades, like a blender bolted under the sink. That picture is wrong, and the misunderstanding leads to a......
  2. When to Repair vs. Replace a Garbage Disposal Two facts settle most repair-or-replace questions about a garbage disposal before you spend a dollar: where the water is coming from, and how old the unit is. A leak at......
  3. What You Should Never Put in a Garbage Disposal A garbage disposal is not a trash can with a motor. It is a grinder that sits at the very top of an ordinary drain, and almost everything people are......
  4. Why Your Garbage Disposal Smells (and How to Clean It) The smell is almost never coming from where you are pouring the lemon. People drop citrus down the drain, run the unit, and the odor returns within a day, because......
  5. Why Your Garbage Disposal Won’t Turn On or Is Humming A disposal that won't run is telling you one of two very different stories, and the sound it makes is the whole clue. Flip the switch and get total silence,......
  6. What to Do When All the Drains in Your House Are Slow When every drain in the house slows down at once, you are no longer looking at a clog. You are looking at a signal. A single slow sink is a......
  7. Why Your Water Heater Is Leaking (and What to Do) Water on the floor near a water heater is not one problem. It is at least four different problems that happen to look alike, and the only thing that matters......
  8. How a Toilet Works: Tank, Bowl, and Flush Explained Press the handle and the whole event is over in about seven seconds, yet almost nobody can say what happened in between. A few ounces of hand motion sets off......
  9. Why Your Sump Pump Isn’t Working or Won’t Turn Off Two opposite failures send people searching for help with a sump pump: dead silence while water creeps up the basement floor, and a motor that runs and runs and never......
  10. Comfort-Height vs. Standard Toilets: Which to Choose The whole choice comes down to a couple of inches at the seat. A standard toilet puts the top of the seat roughly 15 inches off the floor. A comfort-height......
  11. How to Fix a Running Toilet by Replacing the Flapper A worn flapper is the single most common reason a toilet runs, and swapping it is one of the few tank repairs that is genuinely safe to do yourself. The......
  12. How to Test and Maintain a Sump Pump A sump pump only earns its keep on the worst day of the year, which is also the one day you cannot afford to discover it failed. The fix for......
  13. How to Use a Drain Snake or Auger A drain snake, also called an auger, is a flexible steel cable you push and rotate down a drain to physically reach a clog a plunger could not move. The......
  14. How Often a Septic Tank Needs Pumping "Every three to five years" is the number almost every homeowner hears, and it is a reasonable starting point. It is not a rule. The EPA frames that range as......
  15. What Causes a Leaking Shower (Pan, Grout, or Plumbing) A leaking shower almost never announces which of its three very different failures you actually have. The water that stains a ceiling, softens a floor, or seeps along a baseboard......

Leave a comment

Your email address will not be published. Required fields are marked *