How to Fix a Broken Garbage Disposal: Step-by-Step DIY Guide | The Drill Press

Learn how to fix a broken garbage disposal with this step-by-step DIY guide. Troubleshoot jams, leaks, clogs, and power issues before replacing your unit.

8/1/2026

How to Fix a Broken Garbage Disposal: A Step-by-Step DIY Guide

A broken garbage disposal can quickly turn your kitchen into a frustrating mess. Whether it's humming without spinning, leaking under the sink, or refusing to turn on altogether, many garbage disposal problems can be fixed without calling a plumber. Fixing many of the basic issues with a garbage disposal are very easy to handle.

In this guide, you'll learn how to fix a broken garbage disposal, identify common issues, and determine when it's time to replace the unit instead of repairing it.

Table of Contents

  • Common Signs Your Garbage Disposal Is Broken

  • Safety First: Before You Begin

  • How to Fix a Broken Garbage Disposal

    • Check the Power Supply

    • Reset the Disposal

    • Free a Jammed Flywheel

    • Remove a Clog

    • Fix a Leaking Garbage Disposal

    • Replace Worn Components

  • When to Replace Your Garbage Disposal

  • Garbage Disposal Maintenance Tips

  • Frequently Asked Questions

  • Final Thoughts

Common Signs Your Garbage Disposal Is Broken

Not every disposal problem requires a replacement. Here are the most common symptoms and what they usually mean.

The Garbage Disposal Won't Turn On

Possible causes include:

  • Tripped circuit breaker

  • Pressed GFCI outlet

  • Overload protection triggered

  • Faulty wall switch

  • Failed motor

It Hums but Doesn't Spin

This usually means:

  • The flywheel is jammed

  • Food debris is lodged inside

  • The motor is seized

Water Is Leaking

Leaks commonly come from:

  • Sink flange

  • Dishwasher connection

  • Drain pipe

  • Bottom seal

It Drains Slowly

Slow drainage is often caused by:

  • Grease buildup

  • Food clog

  • Blocked drain pipe

Loud Grinding Noises

Unusual noises may indicate:

  • Silverware or foreign objects inside

  • Loose mounting hardware

  • Damaged grinding components

Safety First: Before You Begin

Never work on a garbage disposal while it's connected to power. Water and electricity do not play well together. Safety should always come first.

Before troubleshooting:

  • Turn off the disposal switch.

  • Unplug the unit if possible.

  • If hardwired, switch off the breaker.

  • Never put your hand inside the disposal.

  • Remove rubber grommet if there is one

  • Use pliers or tongs to remove debris.

How to Fix a Broken Garbage Disposal

1. Check the Power Supply

Many "broken" disposals simply aren't receiving power.

Check:

  • Wall switch

  • GFCI outlet

  • Circuit breaker

  • Plug connection

If power has been interrupted, restoring it may solve the problem immediately.

2. Press the Reset Button

Garbage disposals include an overload protector.

Look underneath the unit for a small red reset button.

Steps

  1. Turn off power.

  2. Press the reset button firmly.

  3. Restore power.

  4. Test the disposal.

If it trips repeatedly, another issue is likely causing the overload.

3. Free a Jammed Garbage Disposal

One of the most common fixes is freeing a jammed garbage disposal. You would be surprised what can cause one to jam up.

You'll Need

  • Garbage disposal wrench (Allen wrench)

  • Flashlight

  • Needle-nose pliers

Instructions

  1. Disconnect power.

  2. Inspect inside using a flashlight.

  3. Remove visible objects with pliers.

  4. Insert the Allen wrench into the bottom of the disposal.

  5. Rotate back and forth until it moves freely.

  6. Press the reset button.

  7. Restore power.

Never use your fingers.

4. Remove a Clogged Drain

If water backs up but the motor runs normally, the drain is likely clogged.

Try This

  1. Disconnect power.

  2. Remove the P-trap.

  3. Clean out debris.

  4. Reassemble.

  5. Run hot water.

  6. Test drainage.

Avoid chemical drain cleaners since they can damage disposal components.

5. Fix a Leaking Garbage Disposal

The repair depends on where the leak originates.

Leak at the Sink Flange

  • Tighten mounting screws.

  • Replace plumber's putty if necessary.

Leak at the Drain Pipe

  • Tighten the connection.

  • Replace worn rubber gasket.

Leak at Dishwasher Hose

  • Tighten hose clamp.

  • Replace cracked hose.

Leak from the Bottom

Unfortunately, a bottom leak usually means the internal seal has failed. In most cases, replacing the disposal is more cost-effective than repairing it. When my garbage disposal was leaking I ran through all the other steps before realizing the seal was compromised. In my case, I just replaced my unit. Brand new garbage disposals are not that expensive, and they are rather easy to install.

6. Replace Damaged Parts

Certain components wear out over time.

These include:

  • Splash guard

  • Mounting ring

  • Rubber gaskets

  • Drain connections

Replacing inexpensive parts can extend the life of the disposal significantly.

When Should You Replace a Garbage Disposal?

Sometimes repair isn't worth the effort.

Consider replacing the unit if:

  • It's over 10 years old.

  • The motor has burned out.

  • The housing is cracked.

  • It leaks from the bottom.

  • Repairs would cost nearly as much as a new unit.

New garbage disposals are quieter, more efficient, and better equipped to handle tough food waste. They are also very affordable.

Garbage Disposal Maintenance Tips

Prevent future problems with a few simple habits.

Do

  • Run cold water while operating.

  • Cut large food scraps into smaller pieces.

  • Clean monthly with ice cubes or garbage disposal cleaning tablets.

  • Flush with cold water after use.

Don't

  • Pour grease or oil down the drain.

  • Grind bones unless the unit is designed for them.

  • Dispose of fibrous vegetables like celery in large amounts.

  • Grind coffee grounds excessively.

  • Put pasta or rice down the disposal, as they expand with water.

Proper maintenance can add years to your garbage disposal's lifespan. Take a look at the manufacturer’s manual for your model.

Frequently Asked Questions

Why is my garbage disposal humming but not working?

A humming disposal usually has a jammed flywheel or seized motor. Disconnect power, clear the jam using an Allen wrench, press the reset button, and test again.

Can I repair a garbage disposal myself?

Yes. Most common issues—including jams, clogs, overload trips, and loose connections—can be repaired with basic tools.

Why does my garbage disposal keep tripping the reset button?

Frequent reset trips often indicate an overloaded motor, persistent jam, electrical issue, or failing motor. If you are uncomfortable with electrical components, call a licensed electrician.

How long should a garbage disposal last?

Most quality garbage disposals last 8–15 years, depending on usage and maintenance.

Can a clogged garbage disposal fix itself?

No. Clogs generally require manual removal or cleaning of the drain pipe.

Final Thoughts

Learning how to fix a broken garbage disposal can save you time, money, and the cost of an unnecessary service call. Many of the most common problems—such as power issues, jams, clogged drains, and minor leaks—can be resolved in less than an hour using simple tools.

If you've worked through the troubleshooting steps and your disposal still won't operate, or if it's leaking from the bottom or has a failed motor, replacing the unit is often the smarter long-term investment.

With regular maintenance and proper use, a garbage disposal can provide years of reliable service and help keep your kitchen running smoothly.