Garbage Disposal Not Working? 6 Easy Fixes Before Calling a Plumber

You flip the switch, and nothing happens. Or worse, you hear a low hum while dirty water sits in the sink. A garbage disposal not working is one of the most common kitchen plumbing problems, and the good news is that most cases can be fixed in under 15 minutes with basic tools.

In this guide, our Los Angeles plumbers explain why your garbage disposal stopped working, walk you through 6 safe fixes in the right order, and help you decide when it is time to repair or replace the unit.

Safety First: Read This Before You Start

A garbage disposal has sharp grinding parts and an electric motor. Before you touch anything:

• Turn off the power. Unplug the unit under the sink, or switch off the circuit breaker if it is hardwired.
• Never put your hand inside the disposal, even when the power is off. Use tongs or pliers instead.
• Do not use chemical drain cleaners. They can damage the disposal and splash back on you during repairs.

Why Is My Garbage Disposal Not Working? Match the Symptom to the Cause

The sound your disposal makes, or does not make, tells you a lot about the problem.

6 Easy Fixes for a Garbage Disposal Not Working

Fix 1: Press the Reset Button

Most garbage disposals have a built-in overload protector that cuts power if the motor overheats or jams. This is the most common reason a disposal suddenly stops working.

Where is the reset button on a garbage disposal? Look on the bottom of the unit under the sink. It is usually a small red or black button.

How to reset a garbage disposal:

1. Turn off the wall switch.
2. Wait 10 to 15 minutes to let the motor cool down.
3. Press the reset button firmly until it clicks and stays in.
4. Run cold water and turn the disposal back on.

If the button pops out again right away, the motor is likely jammed. Move on to Fix 3.

Fix 2: Check the Circuit Breaker and Switch

If pressing the reset button does nothing, the disposal may not be getting power at all.

• Check your electrical panel for a tripped breaker labeled for the kitchen or disposal. Flip it fully off, then back on.
• If your disposal plugs in, test the outlet by plugging in a small lamp or phone charger.
• Some outlets under the sink are controlled by the wall switch, so make sure the switch is on during your test.

If the outlet has power but the disposal still does nothing, the wall switch or the motor may be faulty. A failed wall switch is an electrical repair, and a dead motor usually means replacement.

Fix 3: Free a Jammed Disposal (Garbage Disposal Humming)

A humming garbage disposal means the motor is getting power but the flywheel cannot turn. Something, usually a fruit pit, bone, utensil, or bottle cap, is wedged between the flywheel and the grinding ring.

How to unjam it:

1. Turn off the power at the switch and unplug the unit or flip the breaker.
2. Find the hex-shaped hole in the very center of the bottom of the disposal.
3. Insert a 1/4-inch Allen wrench. Many disposals come with one taped to the side or stored under the sink.
4. Work the wrench back and forth until it turns a full circle freely.
5. Use a flashlight and tongs to remove whatever caused the jam.
6. Press the reset button, restore power, run cold water, and test.

No Allen wrench? You can also push a wooden broom handle down into the disposal and gently rock the grinding plate back and forth. Never use your hand.

Fix 4: Unclog a Garbage Disposal With Standing Water

If the disposal runs but water will not drain, food waste is blocking the unit or the drain line below it.

How to unclog a garbage disposal:

1. Turn off the power.
2. Remove standing water with a cup and bucket.
3. Use tongs to pull out any visible debris.
4. Pour 1/2 cup of baking soda into the drain, followed by 1 cup of white vinegar.
5. Let it sit for 15 to 20 minutes.
6. Flush with a pot of hot water, then run the disposal with cold water.

You can also try a sink plunger. If you have a double sink, block the other drain with a wet rag first so the pressure goes where you need it. Avoid plunging if you already poured chemicals down the drain.

Fix 5: Clean the P-Trap and Drain Line

If the disposal is clear but water still backs up, the clog is likely in the P-trap, the curved pipe under the sink.

1. Place a bucket under the trap.
2. Loosen the slip nuts by hand or with channel-lock pliers.
3. Remove the trap, empty it, and clean out any sludge.
4. Reinstall the trap and run water to check for leaks.

If the clog is beyond the trap, a small hand auger can reach it. Our guide on how to use a plumber’s auger shows the right technique. For more on how kitchen drain parts fit together, see our guide on how to install a sink drain.

Important: If several drains in your home are slow at the same time, the problem is probably not the disposal. It may be a main sewer line clog, which needs professional attention.

Fix 6: Stop a Leaking Garbage Disposal

Leaks usually come from one of three spots. Dry everything with a towel, put a few drops of food coloring in the sink, and watch where the colored water appears.

• Sink flange (top): The plumber’s putty seal has failed. Tighten the mounting bolts or reseal the flange.
• Dishwasher hose or drain pipe (side): Tighten the hose clamp or replace the gasket on the drain connection.
• Bottom of the unit: The internal seals have failed or the housing is cracked. This cannot be repaired, and the disposal needs replacement.

When to Replace a Garbage Disposal

How long does a garbage disposal last? Most units last 8 to 15 years, depending on quality and how they are used. Consider replacement if:

• The unit is leaking from the bottom.
• It jams constantly, even after clearing it.
• You reset it often and it keeps tripping.
• The motor is dead even though it has power.
• It is more than 10 years old and grinding poorly.

Replacing a garbage disposal typically costs about $250 to $700 installed, depending on horsepower and features. The unit itself ranges from about $100 to $400 or more. Our plumber cost guide for Los Angeles gives more context on local labor pricing.

Can You Replace a Garbage Disposal Yourself?

If you are comfortable with basic plumbing and the new unit uses the same mounting system, replacing a disposal is a manageable DIY project. You will disconnect the drain and dishwasher hose, twist the old unit off its mounting ring, and attach the new one.

It gets more complicated if the unit is hardwired, the sink flange needs replacing, or the drain pipes do not line up. If you are already working on the sink, our guides on how to install a kitchen sink and how to install plumbing fixtures cover the connections step by step.

What Not to Put in a Garbage Disposal

Most disposal problems start with what goes down the drain. Avoid:

• Grease, oil, and fat: They harden and clog the drain line.
• Fibrous foods: Celery, corn husks, artichokes, and onion skins wrap around the blades.
• Starchy foods: Pasta, rice, and potato peels swell and form a paste.
• Coffee grounds: They collect in the trap and create sludge.
• Egg shells: The membrane can wrap around parts, and the ground shell adds to sludge. Many people ask whether you can put egg shells in the garbage disposal, and the safest answer is no.
• Bones and fruit pits: These are the most common cause of jams.
• Non-food items: Utensils, bottle caps, and twist ties.

How to Keep Your Garbage Disposal Working Longer

A few simple habits prevent most problems:

• Always run cold water before, during, and for 15 seconds after using the disposal.
• Feed food in slowly instead of all at once.
• Run the disposal every few days, even if you do not use it, to prevent rust.
• Clean it weekly by grinding a handful of ice cubes, followed by a few citrus peels for freshness.
• Once a month, use the baking soda and vinegar method to break down buildup.
• Schedule professional drain cleaning if your kitchen drain is slow often. Our drain cleaning cost guide explains what to expect.

Frequently Asked Questions

Why is my garbage disposal humming but not working? A humming sound means the motor has power but the flywheel is stuck. Turn off the power and use a 1/4-inch Allen wrench in the bottom of the unit to free it.

How do I fix a garbage disposal that won’t turn on? Press the reset button on the bottom of the unit, then check the circuit breaker and outlet. If it still has no power, the switch or motor may need replacement.

Can I use Drano in my garbage disposal? We do not recommend it. Chemical drain cleaners can damage the disposal’s seals and metal parts and are dangerous if they splash back during repairs.

Is it worth repairing a garbage disposal? Simple fixes like resetting, unjamming, or tightening a connection are always worth trying. If the unit is leaking from the body or the motor has failed, replacement is usually more cost-effective.

Why does my garbage disposal smell bad? Food particles stuck under the splash guard and on the grinding chamber rot over time. Clean the splash guard with a brush and grind ice and citrus peels regularly.

Still Not Working? Let a Pro Take a Look

Most of the time, a garbage disposal not working comes down to a tripped reset button, a jam, or a clog, and you can fix it yourself in minutes. If you have tried these steps and the disposal is still humming, leaking, or not draining, it is time to call a professional.

Hi Tech Plumbing Services Inc repairs and replaces garbage disposals and clears kitchen drain clogs for homeowners across Los Angeles. Book a service visit and we will tell you honestly whether your unit is worth fixing. If water is backing up or leaking under your sink right now, reach our emergency plumbers for fast help.