Garbage Disposal Not Working? Here's How to Fix It Fast

A garbage disposal is a small machine under your sink that grinds up food scraps.

When it stops working, dirty water and old food sit in your sink and start to smell fast.

The good news: most problems are easy to spot, and many have simple fixes you can try in minutes. In this guide, the team at ASAP Plumbing Pros explains why your garbage disposal is not working and how to fix it safely.

If a fix doesn’t work, we are open 24/7 across San Francisco and San Mateo County.

Why Isn’t My Garbage Disposal Working?

Most disposal problems come from one of three causes: no power, a jam, or a worn-out motor. The sound your unit makes - or doesn’t make - tells you a lot.

Here’s how to read the signs.

Garbage Disposal Not Turning On

If your garbage disposal won’t turn on at all - no hum, no sound - power is not reaching the motor. First, make sure the unit is plugged in under the sink.

Then check the wall switch. If both are fine, look at your breaker box. A tripped breaker is a common reason a garbage disposal stopped working right after a heavy grind.

Flip the breaker back on and try the switch again.

Garbage Disposal Humming But Not Working

A humming sound means the motor has power, but something is blocking the blades.

Bones, fruit pits, silverware, or hard food scraps often get stuck. Do not hold the switch on while it hums - the motor can overheat and burn out.

Turn the power off and free the jam with the steps below.

Garbage Disposal Stopped Working After Overloading

Stuffing too much food down at once can overload the motor. When that happens, the reset button on the bottom of the unit pops out to protect the motor.

Until you press it back in, the disposal won’t run, even with power.

How to Fix a Garbage Disposal in 5 Safe Steps

These five steps fix most disposal problems. Work slowly and keep safety first.

1. Turn off the power. Unplug the unit under the sink or switch off the breaker. Never reach inside while the power is on.
2. Press the reset button. It’s on the bottom of the unit, usually red or black. Push it in until you feel a click.
3. Free the jam from below. Find the small hex hole in the center of the unit’s bottom. Insert an Allen wrench and turn it back and forth to move the blades. Most disposals come with this wrench.
4. Move the blades from above. Look inside with a flashlight. Use a wooden spoon handle or tongs - never your hand - to push the blades until they spin freely.
5. Test the unit. Plug it back in, run cold water, and flip the switch for a few seconds while the cold water runs.

Still stuck? The motor or wiring may be worn out.

That is the point of calling a licensed plumber. Our garbage disposal repair and replacement service covers jam clearing, repairs, and new installs - often in a single visit.

Garbage Disposal Not Working but Has Power? What to Check

If the unit has power but still won’t run, check this list:

• The reset button popped again - press it and try once more.
• The wall switch is worn out and needs to be replaced.
• A deeper jam sits in the grind ring where a wrench can’t reach.
• The motor has burned out and the unit needs replacing.

If the unit trips the breaker again and again, stop using it - that points to an electrical fault, and repeated resets can make things worse.

How to Keep Your Garbage Disposal Working Longer

A few simple habits go a long way:

• Run cold water every time you use the disposal, and for 20 seconds after.
• Feed food in small amounts instead of dumping it in a full plate.
• Never pour grease or oil down the drain - it hardens and jams the blades.
• Skip hard items like bones and fruit pits, and stringy foods like celery.
• Grind a few ice cubes once a month to clean the blades.

Grease and food buildup can also clog the drain lines past the disposal. If your whole sink keeps backing up, professional drain cleaning may be the real fix.

When to Stop and Call a Plumber

Do-it-yourself fixes only go so far. Call a licensed plumber if:

• The disposal trips the breaker more than once.
• Water leaks from the bottom of the unit.
• You smell burning or see smoke.
• The unit is more than 10 years old and keeps breaking down.

At ASAP Plumbing Pros, we repair and replace all major disposal brands, quote upfront before we start, and back our work with a warranty.

Reach us through our contact page any time - day or night.

FAQ

Why is my garbage disposal humming but not working?

The motor has power, but a hard object is jamming the blades. Turn off the power, press the reset button, and free the jam with an Allen wrench from below.

Running it while it hums can burn out the motor.

How do I reset my garbage disposal?

Find the small reset button on the bottom of the unit. It’s usually red or black. Press it firmly until it clicks, then try the switch again with cold water running.

Can I put my hand in the garbage disposal?

No. Even with the switch off, the blades can still move. Unplug the unit or cut the breaker first, and use tongs or a wooden spoon to remove anything stuck inside.

What should I never put in a garbage disposal?

Grease, oil, bones, fruit pits, pasta, rice, and stringy vegetables like celery. These either jam the blades or swell up and block the drain.

How long does a garbage disposal last?

Most units last 10 to 15 years with normal use. If yours is older and keeps breaking, replacing it usually costs less than paying for repeat repairs.

Need help?

A garbage disposal not working is annoying, but many fixes take under ten minutes: check the power, press the reset button, and free the jam.

If those steps don’t work, the motor or wiring may be done - a job for a pro.

Need help right now? Contact ASAP Plumbing Pros. or contact us online.

We are open 24/7, offer same-day service across the Bay, and serve homes from San Francisco to San Mateo County.