A malfunctioning garbage disposal can be incredibly frustrating for you, especially if you rely on it daily to manage food scraps and waste. When your disposal isn’t working as expected, the cause could range from simple clogs to more complex electrical or mechanical issues. Understanding the problem can help you determine whether you can fix it yourself or if it’s time to call in a professional to help solve the problem.
At Horizon Services in Denver, CO, we assist customers daily with garbage disposal repairs. In this guide, we’ll discuss the eight most common reasons your garbage disposal might stop working, practical solutions you can try at home, and when to seek professional assistance.
1. Overloaded Disposal
Garbage disposals can become overloaded if too much food waste is dumped in at once or if substances like grease are poured down the drain. Overloading can cause the motor to overheat, tripping the unit’s circuit breaker and shutting it down entirely.
To fix this, turn off the disposal and allow it to cool for about 15 minutes. Then, press the reset button located on the bottom of the unit. If the motor hasn’t been damaged, your disposal should start working again.
Prevent future overloads by disposing of food waste in smaller batches. Avoid pouring grease, fat, or oil down the drain, as these substances can solidify and create blockages in the system, which will lead to further problems.
2. Blocked or Broken Drain Line
Clogged or damaged drain lines are another common issue with garbage disposals. Food particles and debris can accumulate in the drainpipe, and this will cause water to back up and prevent proper operation. In more severe cases, a broken drain line may leak, leading to water damage in your kitchen.
To address this, have a plumber inspect the drain line by removing the trap beneath the sink. They will use a plumber’s snake or drain cleaner to remove clogs. If they find visible damage, such as cracks or leaks, the line may need professional replacement. Regular cleaning and careful disposal of waste can minimize drain line issues.
3. Electrical Issues: Power Problems
If your garbage disposal doesn’t respond when turned on, the issue might be electrical. Blown fuses, tripped circuit breakers, or faulty wiring are often the culprits.
First, check your home circuit breaker panel to see if the disposal breaker has tripped. Reset it if necessary. If a blown fuse is to blame, replace it with a new one. For wiring issues, or if you’re unsure of the root cause, contact a licensed electrician. Electrical problems can be dangerous to address without proper training.
4. Clogs and Jams: The Most Likely Culprit
Clogs and jams are among the most frequent reasons garbage disposals stop working. Over time, food particles, grease, and debris can build up in the grinding chamber, and this will prevent the unit from breaking down waste effectively. If your disposal hums but doesn’t grind, a clog or jam is likely to blame.
Turn off the power to the unit before attempting to clear the blockage. Then, press the reset button to see if this resolves the issue. If not, use pliers or a wooden spoon handle to remove visible debris from the grinding chamber. Avoid using your hands, as the blades can cause serious injury.
For stubborn clogs, try using a plumber’s snake to dislodge the obstruction. If the issue persists, disassembly may be required, which is best handled by a professional.
5. Clogged Air Gap or Dishwasher Connection Issues
If your garbage disposal is connected to a dishwasher, a clogged air gap or kinked dishwasher hose can disrupt its operation. The air gap prevents wastewater from flowing back into the dishwasher, but debris can accumulate and cause blockages.
Remove the air gap cover and clean out any debris using a small brush or pipe cleaner. For dishwasher hose issues, disconnect the hose from the disposal and check for clogs or kinks. Clean or straighten the hose as needed to restore proper flow.
6. Jammed Impeller Blade
The impeller blade inside your garbage disposal is responsible for breaking down food waste. Hard objects like bones, silverware, or fruit pits can jam the blade, and this will prevent it from spinning. If your disposal hums but doesn’t grind, a jammed impeller blade is likely the cause.
Turn off the power and use a hex wrench to manually rotate the impeller. This can help loosen obstructions. If necessary, use pliers or tongs to remove the jammed object. If the blade is damaged, contact a plumber for repair or replacement.
7. Worn-Out Motor
If your garbage disposal makes a humming noise but doesn’t function, the motor may be worn out. Over time, frequent use can cause the motor to degrade and lose efficiency.
When the motor fails, you’ll need to decide whether to repair or replace the unit. In many cases, replacing the motor or the entire disposal may be more cost-effective. Consult a professional plumber to determine the best course of action.
8. Seals and Leaks
Leaks are a common issue with garbage disposals. They often result from worn seals, loose mounting bolts, or corroded components. Water escaping from the unit can lead to damage under your sink or on surrounding surfaces.
Turn off the power and water supply before addressing leaks. Tighten any loose bolts and inspect the seals for wear. Replace damaged seals to stop leaks. If the disposal itself is corroded or severely damaged, a full replacement may be necessary.
Preventing Garbage Disposal Issues
Preventative maintenance is essential for keeping your garbage disposal in top shape. Follow these tips to avoid common problems:
- Run cold water: Always use cold water when running your disposal. It helps solidify grease, making it easier to grind and flush away.
- Avoid hard items: Never put bones, fruit pits, or other hard objects into the disposal. These can damage the impeller and motor
- Dispose of food properly: Cut large items into smaller pieces before placing them in the disposal. Avoid fibrous foods like celery or corn husks, which can tangle around the impeller.
- Clean regularly: Use a mixture of baking soda and vinegar weekly to clean the disposal and eliminate odors.
Contact Us Today
Fixing a malfunctioning garbage disposal doesn’t have to be overwhelming. By understanding the common causes—from clogs and jams to electrical issues—you can take steps to resolve the problem quickly and safely. For more complex issues or when in doubt, it’s always best to call a professional.
At Horizon Services, we specialize in garbage disposal repairs for homeowners and businesses in Denver, CO and the surrounding areas. Whether you need a quick fix or a complete replacement, our skilled team is here to help. We also provide HVAC and plumbing services, like water heater repair, to ensure your home runs smoothly. Contact us today to schedule your plumbing service and experience the difference!
