Garbage Disposal Not Working? How to Fix It

Your garbage disposal stopped working and now you've got a sink full of food scraps with nowhere to go. Before you call anyone or start pricing replacements, work through these checks. Most disposal problems have a straightforward cause, and a good number of them you can fix in under ten minutes.

It Just Needs a Reset

This is the first thing to try, and it fixes the problem more often than you'd think.

On the bottom of your garbage disposal (yes, underneath the unit, you'll need to crouch down or get a flashlight) there's a small red or black reset button. When the disposal overloads from too much food, something hard in the drain, or just running too long, a thermal overload trips and shuts it off. The reset button pops out when that happens.

Press it firmly until you feel it click back in. Then flip the wall switch. If it works, you're done.

If the button won't stay in, or pops back out right away, something is still causing the overload. That usually means a jam. Move to the next section.

It's Jammed

You flip the switch and hear a humming sound but nothing spins. That's a jammed disposal. The motor is running but the grinding plate is stuck.

There's a hex wrench socket on the very bottom center of the unit. Most disposals take a 1/4-inch hex wrench, and some come with one when you buy them. If you don't have one, a standard Allen wrench set will have the right size. Insert it into the socket and work it back and forth to manually free the grinding plate. Once it moves freely, remove the wrench, press the reset button, and try the switch.

One thing I want to be clear about: do not put your hand inside the disposal. Not to clear a jam, not to retrieve something that fell in, not for any reason. The grinding plate and shredder ring are sharp even when the power is off. Use tongs, pliers, or a wooden spoon handle to fish things out from the top. Turn off the power at the wall switch and at the breaker if you're reaching in at all.

No Power at All

The disposal doesn't hum, doesn't make any noise, and the reset button isn't the issue. Start with the obvious.

Check the outlet. Most disposals are plugged into an outlet under the sink. Is it plugged in? Some of those outlets are on a switch or are connected to a GFCI outlet in the kitchen that may have tripped. Find the GFCI outlet nearby, usually near the sink or on another wall in the kitchen, and press the reset button on it.

Check your breaker panel for a tripped breaker. It'll be in the half-off position, between on and off. Reset it if you find one.

If power is reaching the outlet but the disposal still does nothing, the problem is either a failed wall switch or a dead motor. Switches are cheap and simple to replace. A burned-out motor means the unit itself has failed. At that point, replacement usually makes more financial sense than a motor swap.

It's Leaking

Not all leaks are equal with garbage disposals. Where it's leaking from tells you a lot about what's wrong.

Leaking from the top, around where the disposal meets the sink drain: the mounting flange is loose or the plumber's putty underneath it has dried out and cracked. You can reseat the flange and repack it with fresh putty. It's a bit of a project since it involves removing the unit, but it's not expensive to fix.

Leaking from the side, where the dishwasher drain hose connects: the hose clamp has loosened or the rubber gasket inside the inlet port has worn out. Tighten the clamp first. If that doesn't stop it, the gasket needs replacing.

Leaking from the bottom: this is internal seal failure. Water drips from the drain holes at the very bottom of the unit. Once the internal seals go, there's no practical repair. The unit needs to be replaced.

Persistent Odors

A disposal that smells bad isn't broken, but it's telling you something. Food debris builds up in places the water doesn't flush clean: under the rubber splash guard, along the grinding ring, in the drain chamber itself.

A simple trick that works: drop a handful of ice cubes into the disposal and run it with water. The ice helps scrub the grinding ring and knock loose debris off the walls. Follow that up with a few chunks of citrus peel, like lemon, lime, or orange, while it's still running. The citrus oils cut through the grease and leave a clean smell.

For a deeper flush, pour half a cup of baking soda down the drain, let it sit for ten to fifteen minutes, then run hot water through while the disposal runs.

What you should not be putting down the disposal: grease and cooking oil, fibrous vegetables like celery or artichoke leaves, large bones, egg shells in large quantities, and pasta or rice that expands with water. These are the things that cause odors, jams, and early wear.

When to Replace vs. Repair

Most garbage disposals last ten to fifteen years with normal use. If yours is past that range and something major fails, replacement often makes more sense than repair.

The clearest sign that replacement is the right call: it's leaking from the bottom. As I mentioned above, that's an internal seal failure and the unit can't be repaired economically. The same goes for a burned-out motor. A new disposal runs between $100 and $250 for a decent unit, and installation is straightforward for someone comfortable with basic plumbing.

On the other hand, if the disposal is only a few years old and the issue is a jam, a tripped reset, or a worn gasket, repair is almost always worth it. Those are cheap fixes.

If you're not sure which situation you're in, I'm glad to take a look.

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I'm Jake with RMAS Appliance Repair in Fort Collins. I work on appliances throughout Northern Colorado, including Loveland, Windsor, and Greeley.

If you've worked through this list and still can't get your disposal working, give me a call at (970) 443-4367. Disposal repairs are usually quick and affordable. Let's figure out whether you need a fix or a replacement before you spend money on the wrong thing.