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How to Fix a Garbage Disposal That’s Not Working

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Updated On

April 11, 2025

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A malfunctioning garbage disposal can quickly turn into a kitchen nightmare. From foul odors to backed-up sinks, a broken disposal disrupts daily routines and can lead to more serious plumbing issues if left unaddressed. But before calling in a professional, there are several troubleshooting steps you can take to get your disposal up and running again.

This guide will walk through the common causes of garbage disposal problems, step-by-step fixes for various issues, and when to call the experts. Many disposal problems can be resolved quickly and affordably with a little know-how and some basic tools.

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Key Takeaways

  • Power issues are the most common problem behind malfunctioning garbage disposals.
  • Most common garbage disposal repairs cost $150 or less, although they can go higher.
  • If you’re unsure how to repair your garbage disposal safely, call a professional plumber. 

Common Causes of Garbage Disposal Problems

Understanding the roots of common garbage disposal problems is essential before diving into repair solutions. By identifying these causes, you can better tackle the issue or prevent future malfunctions.

Power Issues

One of the simplest explanations for a disposal that won’t work is a power problem. Start by checking if the disposal is unplugged or a circuit breaker has tripped. Ensuring a stable power supply is critical for the disposal’s operation.

Jams and Clogs

Food debris, particularly fibrous or starchy items, can cause jams in the disposal’s impellers or clogged drain lines. Such blockages hinder the proper spinning of the unit, causing it to malfunction.

Worn-Out Parts

Over time, essential parts like the flywheel or impellers may degrade, resulting in diminished performance or complete failure of the unit. Understanding the lifespan of various parts can help decide whether repair or replacement is more appropriate.

Improper Use

Garbage disposals are designed to handle specific types of waste. Inserting inappropriate items like metal utensils or overly hard food scraps can lead to damage and malfunctions, highlighting the importance of understanding the disposal’s limitations.

How to Troubleshoot a Garbage Disposal (5 Steps)

Faced with a non-working disposal, it’s useful to have a step-by-step process for diagnosing and tackling the problem. Based on my many years of experience, the following steps provide a structured approach to getting your disposal back on track:

Diagram of garbage disposal components]
Image credit: Adobe Stock

1. Check the Power Supply

Begin by ensuring the disposal is connected to a functional power source. Examine the power cord for visible damage, which might require replacement. If the outlet is in question, plug in a device known to be operational, such as a lamp, to test its reliability. If there’s no power, inspect the home’s main electrical panel for a tripped breaker.

Pipes and electrical under a residential kitchen sink
Image Credit: Adobe Stock

2. Press the Reset Button

Most disposals include a reset feature, typically a small red button at the base. Check for this when the disposal overheats, after a power anomaly, or if there is a large blockage. A simple press and release, followed by a retest, can often resolve the issue.

The reset button is located on the underside of the garbage disposal.
Image Credit: Canva

3. Inspect the Circuit Breaker

If the reset button doesn’t fix the problem, the next step is checking the main circuit breaker. Locate the breaker connected to the kitchen or disposal‌ — a switch in the middle position indicates it has tripped. Firmly switch it off and then back on, and retest your disposal.

An electric circuit breaker
Image credit: Adobe Stock

4. Check for Obstructions

Use a flashlight to look inside the disposal chamber with all power disconnected. Inspect for any foreign objects, using kitchen tongs or similar tools to extract items like utensils or toy parts‌ — ‌never reach in with your hands.

5. Manually Rotate the Impellers

The impellers might be jammed if the unit is clear but still not operating. Many disposals feature a hex hole at the base for manual rotation. Insert a ¼-inch hex wrench and gently turn it back and forth to release the jammed impellers, unclogging the system.

Today’s Homeowner Tip

Don’t just turn off the disposal switch when you work on your garbage disposal. Unplug it first. You can find the electrical outlet under your kitchen sink.

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Fixing Common Garbage Disposal Issues

While basic troubleshooting may resolve minor issues, significant problems require more targeted solutions. Here’s how to tackle several common disposal challenges and get it running again:

Garbage Disposal Humming But Not Spinning

A humming noise from the disposal often reveals that it’s receiving power, but the impellers are stuck, likely due to a jam or a locked-up motor. To remedy this situation, begin by turning off the disposal power completely. Then, use the method of manual impeller rotation with the hex wrench as described earlier. 

Once you’ve attempted to free the impellers, restore power and check if the disposal operates as expected. If these steps prove unsuccessful, you may be dealing with a more serious issue‌ — ‌the motor might need a full replacement due to being seized beyond repair.

Garbage Disposal Draining Slowly

Slow drainage usually signals a clog within the disposal or the associated pipes. The solution begins by running cold water through the system and turning on the disposal to see if it clears naturally. If this doesn’t resolve the issue, turn off the power and disconnect the unit. 

Next, attempt to dislodge any blockage with a sink plunger, using one specifically designed for sink use to achieve effective pressure. If the drainage problem persists, you might need to take more extensive measures by removing the P-trap under the sink and inspecting for solid obstructions.

Garbage Disposal Leaking

There are two ways your garbage disposal can leak; each with it’s own means of action:

Leaking from the Top

Leaks in garbage disposals can originate at several points, requiring different approaches for resolution. When dealing with leaks from the top, this typically suggests issues around the sink flange or the mounting assembly. 

The first step is to tighten the mounting bolts that secure the disposal to the sink. If the leak continues, detach the disposal unit and examine the rubber gasket. Should you find the gasket damaged, replace it before reinstalling the device.

Leaking from the Bottom

The situation is usually worse for leaks from the bottom of the unit. This often means the internal seal is broken or the disposal housing has cracks. Unfortunately, leaks in the bottom usually mean the unit is old and can’t be used anymore. If you have to replace the whole disposal, it’s usually the cheapest option.

Some skilled DIYers might try to fix internal seals, but manufacturers usually suggest replacing the whole thing when fixing bottom leaks. This is because it’s hard to fix internal repairs and problems can come back.

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When to Replace a Garbage Disposal

While some issues with garbage disposals can be repaired, certain circumstances warrant considering a replacement. Evaluate replacement if:

  • The unit exceeds 10 years of age, as newer models may offer improved features and efficiency.
  • The cost of repairs nears or surpasses half the price of acquiring a new disposal unit.
  • The disposal motor is irreparably burnt out.
  • The device suffers from recurring or multiple issues soon after repairs, showing widespread wear.

When seeking a new disposal, research various models based on factors such as horsepower, noise levels, and the size of the grinding chamber to meet household needs.

When to Call a Professional

Not all problems with a garbage disposal can be solved DIY. Recognizing when to call a professional is essential to avoid further damage. Seek expert help if:

  • Water damage or mold is clear around the disposal area.
  • Persistent electrical issues continue despite checks on the outlet and circuit breaker.
  • The disposal is challenging to access, detach, or reinstall.
  • DIY repairs do not resolve the problem or only offer a temporary fix.
  • There’s uncertainty concerning repair safety or proper procedures.

Experts have the tools and skills to diagnose complex issues and execute repairs safely and efficiently.

Final Thoughts About Fixing a Garbage Disposal That’s Not Working

A non-working garbage disposal can be a frustrating kitchen setback, but many issues are solvable with some basic troubleshooting and DIY repairs. Following the steps outlined in this guide, you can often get your disposal back up and running without needing costly professional intervention.

Remember that safety should always come first when working on any appliance. If there’s any doubt about how to proceed or if initial attempts at repair aren’t successful, don’t hesitate to call a professional plumber. With proper care and maintenance, a garbage disposal can provide years of reliable service, making kitchen cleanup easier and more efficient.

FAQs About Garbage Disposals Not Working

Why would garbage disposal suddenly stop working?

If your garbage disposal suddenly stops working, a few issues could be the culprit. Electrical circuit issues, power issues, and clogs from something you shouldn’t have put in the disposal are the most common reasons behind garbage disposals not working. However, the specific problem behind your garbage disposal’s malfunction hinges on factors specific to your situation.

Why is my garbage disposal turning on but not spinning?

If your garbage disposal turns on, but the impellers don’t spin, there’s a good chance a clog is impeding its function. When there’s a blockage in the canister, the impellers can’t spin freely, preventing the disposal from doing its job. So if your garbage disposal turns on but the impellers are frozen, there might be a clog.

What does a jammed garbage disposal sound like?

A jammed garbage disposal usually makes a humming sound. It’s a starkly different noise from its usual crunching sound as it chews through food scraps, as it’s considerably more muted.

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Jonathon Jachura

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Jonathon Jachura is a two-time homeowner with hands-on experience with HVAC, gutters, plumbing, lawn care, pest control, and other aspects of owning a home. He is passionate about home maintenance and finding the best services. His main goal is to educate others with crisp, concise descriptions that any homeowner can use. Jon uses his strong technical background to create engaging, easy-to-read, and informative guides. He does most of his home and lawn projects himself but hires professional companies for the “big things.” He knows what goes into finding the best service providers and contractors. Jon studied mechanical engineering at Purdue University in Indiana and worked in the HVAC industry for 12 years. Between his various home improvement projects, he enjoys the outdoors, a good cup of coffee, and spending time with his family.
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Roxanne Downer is a commerce editor at Today’s Homeowner, where she tackles everything from foundation repair to solar panel installation. She brings more than 15 years of writing and editing experience to bear in her meticulous approach to ensuring accurate, up-to-date, and engaging content. She’s previously edited for outlets including MSN, Architectural Digest, and Better Homes & Gardens. An alumna of the University of Pennsylvania, Roxanne is now an Oklahoma homeowner, DIY enthusiast, and the proud parent of a playful pug.
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