If your garbage disposal is jammed, you will usually hear it: a low hum when you flip the switch, and nothing grinding. That hum means the motor is getting power but the grinding plate can't turn, because something is wedged against it. Most jams clear in about ten minutes with the power off, a flashlight, a pair of tongs and a hex wrench. The key is doing it in the right order, and never putting your hand down the drain.
This guide walks you through that order, explains what usually causes a jam, helps you tell a jam from a real breakdown, and tells you when it's time to hand the job to a licensed plumber.
TL;DR
- A humming disposal that won't spin is almost always a mechanical jam. Turn off the switch and cut power at the plug or breaker before you do anything else.
- Never reach in by hand. Pull out visible debris with tongs or pliers, then turn the grinding plate by hand with a hex wrench.
- Press the red reset button, restore power, run cold water and test briefly. If it hums and stops again, or the reset keeps popping, stop.
- A silent unit, burning smell, smoke, or a leak means a professional should look at it, along with any slow drain that points to a clog further down the line.
Table of Contents
- What a jammed disposal is actually telling you
- What usually causes a garbage disposal to seize up
- How to unjam a garbage disposal, step by step
- When the disposal still won't work
- When the problem is the drain, not the disposal
- How to keep a disposal from jamming again
- Our perspective: fix the cause, not just the symptom
- When to call Waller's
- Safety checklist before you reach under the sink
- FAQ
- Sources
What a jammed disposal is actually telling you
A disposal isn't a blender with blades. Inside the chamber, a spinning plate with small impellers flings food against a grinding ring, and water flushes the particles away. When something hard or stringy lodges between the plate and the ring, the plate stops. The motor keeps trying to turn it, which is the hum you hear.
That hum is useful information. According to Maytag's product help, a humming motor with no rotation, seized impellers or a visible obstruction points to a mechanical jam. A unit that makes no sound at all, trips the breaker often, or has a reset button that pops again and again points toward an electrical problem instead.
Those two situations call for different responses, so it helps to figure out which one you have before you start.
| What you notice | Most likely cause | What to do |
|---|---|---|
| Hum, no spinning | Jam: something wedged against the grinding plate | Follow the unjamming steps below |
| Total silence when you flip the switch | Tripped internal breaker, or an electrical fault | Try the reset button once; if that does nothing, call a pro |
| Reset button pops again right away | Jam still present, or motor or wiring trouble | Cut power and repeat clearing once, then call for service |
| Runs fine but water drains slowly | Clog in the sink drain, not the disposal motor | Look past the disposal at the drain line |
| Burning smell, smoke, or water under the unit | Failing motor or leaking seal | Stop using it and call a plumber |
The last two rows matter. The Spruce notes that humming with no grinding usually means the impeller or flywheel is jammed, while slow draining more often reflects a sink-drain clog than a failed motor. Plenty of people replace a perfectly good disposal when the real trouble is downstream.
What usually causes a garbage disposal to seize up
Most jams trace back to a short list of culprits. Maytag lists hard pits and bones, metal or glass fragments, fibrous peels, clusters of eggshell and non-food items. Moen adds lodged chicken bones, metal spoons, broken glass or ceramic, and fibrous material such as corn husks or broccoli stems, which can stop the turntable or wrap around an impeller.
In a real kitchen, that looks like:
- A spoon or fork that slid off a plate during rinsing.
- A peach or avocado pit that went down with the scraps.
- A broken glass or a chipped dish swept into the sink.
- Celery, corn husks or artichoke leaves, stringy material that wraps instead of grinding.
- A bottle cap, twist tie or sticker from produce.
- A big handful of scraps pushed in all at once.
There are also causes you can't see. Repeated attempts to run a jammed unit can trip its internal breaker, and Moen notes that the disposal may then stop grinding, moving, or making any sound. So a silent disposal is sometimes just a jammed one that was switched on too many times. That's why the reset button is part of the fix.
How to unjam a garbage disposal, step by step
You need very little: a flashlight, long tongs or needle-nose pliers, and the small hex wrench (usually 1/4 inch) that often came with the disposal. If you've lost the wrench, a hardware store sells one for a few dollars, and the unit's model name will tell you which size fits.
Step 1: Kill the power
Flip the wall switch off. Then go one step further and cut the power at the source. Whirlpool's instructions say to switch off the wall control and either unplug the disposer or turn off its dedicated breaker before inspecting or resetting it, and never to put a hand inside the grinding chamber while power is connected. Under the sink, many disposals plug into an outlet in the cabinet. If yours is hardwired, use the breaker panel.
A wall switch can be bumped back on by a child or a roommate. A pulled plug or a taped-down breaker can't.
Step 2: Look inside with a light
Shine the flashlight down the drain. If you see a spoon, glass, a bottle cap or a pit, pull it out with tongs or pliers. Keep your fingers out of the chamber, even with the power off. The impellers aren't razor sharp, but a jammed plate can release suddenly, and broken glass doesn't care that the power is off.
Step 3: Turn the plate by hand
Look at the underside of the disposal, at the center of the bottom. You'll find a hex-shaped socket. Insert the wrench and work it back and forth. Moen's guidance is to rotate the turntable clockwise or counterclockwise until it completes at least two full revolutions. You may feel resistance at first, then a sudden give as the obstruction releases.
If the wrench won't move at all, don't force it with a cheater bar or a pipe wrench on the housing. Go back to the flashlight and look again for what's stuck.
Some newer models have no socket on the bottom. In that case, the manufacturer's manual will describe another way to free the plate, and it's worth a quick search of the model number printed on the unit.
Step 4: Press reset
Near the hex socket, you'll find a small red button. That's the overload reset. Press it firmly until it clicks. If it was tripped, it will stay in.
Step 5: Restore power and test
Plug the unit back in or flip the breaker on. Run cold water, then switch the disposal on briefly. Maytag's steps say that if it hums and stops, or the reset pops again, you should cut power and seek service. One more round of clearing is reasonable. Three or four rounds is a sign that something else is wrong.
A note on what not to use
Don't pour drain cleaner into a jammed disposal. It doesn't dissolve a spoon or a bone, and it leaves caustic liquid sitting in a chamber you or a plumber may need to put hands near. And skip the old trick of grinding ice and rock salt to "clear" a jam. When the plate can't turn, there's nothing to grind with.
When the disposal still won't work
If you've cleared the chamber, turned the plate freely, pressed reset and the unit still hums, stays silent or trips again, you've reached the edge of safe DIY. Per Maytag, if it stays silent, smells of burning, smokes, leaks, or you're unsure about electrical steps, stop and call a professional.
Here's how we'd think about the common outcomes:
- The plate spins freely but the motor only hums. The motor may be failing, or the bearings may be worn. That's a replacement conversation, not a repair.
- The plate is stuck even after you clear debris. Something may be bent, or the bearings seized. A professional should evaluate it.
- The unit runs but leaks. Leaks come from the sink flange, the drain connections or the housing itself. Each has a different fix.
- Water backs up into the other side of a double sink. The problem is probably the drain line, not the disposal.
A leaking disposal also puts the cabinet floor at risk. Particleboard swells quickly when it's wet. While you wait for repairs, a custom-cut under-sink cabinet mat with a raised lip can contain drips and protect the base of the cabinet. It's a stopgap, though. The real fix is finding and stopping the leak.
When the problem is the drain, not the disposal
Sometimes the disposal is innocent. If the motor runs and the blades turn but the sink drains slowly, gurgles or backs up, you're probably looking at a clog in the trap or the drain line. Grease, starchy food and coffee grounds love to collect in those pipes.
If more than one fixture is slow, the cause may be further down. Our camera-first sewer line clog checklist lays out the signs that point to a main line problem instead of a single sink. When a kitchen sink backs up while the shower or washer drain also acts up, that checklist is the place to start.
How to keep a disposal from jamming again
A few habits make a big difference.
- Run cold water the whole time. Whirlpool recommends running cold water before, during and for 15 to 30 seconds after use.
- Feed scraps gradually. Small amounts at a time give the plate room to work. That's another Whirlpool tip, and it's the single best habit for avoiding jams.
- Keep the usual suspects out. Bones, pits, fibrous peels, eggshell piles and anything that isn't food belong in the trash or compost.
- Check the sink before you switch on. A quick look for a stray utensil or bottle cap saves a service call.
- Don't pour grease down the drain. It coats the pipe walls and sets up the next clog, even if the disposal handles it.
In New Mexico there's one more factor. Our water is often hard, and mineral scale can build up inside drains, fittings and fixtures over the years. It doesn't jam a disposal overnight, but it narrows pipes and makes the whole kitchen plumbing system work harder. If your faucet aerator crusts over with white deposits, you're seeing the same minerals at work.
Our perspective: fix the cause, not just the symptom
After 38 years of plumbing work in New Mexico homes, we've seen a lot of disposals that were never really broken. A spoon, a pit, a handful of celery. People hear the hum, assume the motor has died, and start pricing replacements. More often than not, ten minutes with a hex wrench would have solved it.
We've also seen the opposite: homeowners who kept pressing reset, kept flipping the switch, and wore out a motor that could have been saved. A hum is the motor asking for help. Give it a minute with the power off and the problem usually tells you what it is.
Where we do get called is when a "jammed disposal" turns out to be a sign of something bigger: a slow kitchen drain that's really a partially blocked line, a leak under the sink that has been quietly damaging the cabinet, or a connection that was never installed quite right. Those are the jobs where a licensed plumber earns the call. We'd rather you get it right the first time than spend a weekend guessing.
And when you call, a real person from your own community should answer, not a phone menu. That's how we've always done it.
— Aaron Waller, General Manager
When to call Waller's
If your disposal is still jammed after a careful attempt, if it's leaking, or if you've got slow drains that don't go away, we can take a look. We serve homeowners across New Mexico, including Albuquerque, Rio Rancho and Corrales. Our licensed plumbers handle plumbing repairs, leak detection, faucet repair and more, and we leave your kitchen as clean as we found it.
Book an appointment through our site or reach us directly, and you'll talk to a local expert who knows New Mexico homes. If the problem under your sink is part of something larger, you can also browse our home comfort and plumbing tips for related guidance.
Safety checklist before you reach under the sink
Before you start, run through this short list. It takes a minute and protects you from the most common mistakes.
- The wall switch is off.
- The disposal is unplugged, or its breaker is off and labeled.
- You have a flashlight, so you're looking instead of feeling.
- You're using tongs or pliers, not your fingers.
- The sink has no standing water you could mistake for a safe pour. Bail it out with a cup if needed.
- Nobody else in the house will flip the switch while you work.
If any of those isn't true, stop and fix it before you go on.
FAQ
Why is my garbage disposal humming but not spinning?
The motor is getting power, but something is blocking the grinding plate. Turn off the switch, cut power at the plug or breaker, remove any visible debris with tongs, and turn the plate with a hex wrench from underneath. Then press the red reset button and test.
How can I tell whether my disposal is jammed or broken?
A hum with no rotation usually means a jam. Total silence, frequent breaker trips, or a reset that keeps popping suggest an electrical issue or a worn motor. A disposal that runs fine but drains slowly usually has a clog in the drain, not a failed motor.
Can I pour something down the disposal to unjam it?
No. Liquids don't free a stuck plate, and drain cleaner can leave harsh chemicals in the chamber. Cut power, remove the object and turn the plate by hand. For prevention, run cold water during and after each use and feed scraps slowly.
How many times should I press the reset button?
Once after clearing the jam is the right approach. If it hums and stops again, or the button pops right back, cut power and repeat the clearing steps one more time. After that, call a plumber rather than forcing a motor that is telling you something is wrong.
Is it safe to put my hand in a jammed disposal if the power is off?
It's better not to. Even with power disconnected, a jammed plate can shift, and the chamber can hold broken glass or sharp bone fragments. Use tongs or needle-nose pliers and a flashlight instead.
Sources
- How to Reset a Garbage Disposal, Whirlpool Product Help
- Clearing a Jammed Disposer, Maytag Product Help
- How to Unjam a Garbage Disposal, Moen Solutions
- How to Fix a Garbage Disposal That's Not Working, The Spruce