If your garbage disposal is humming but not working, it’s likely a sign that something is preventing the blades from turning. This issue is often minor, but without prompt action, it can escalate, potentially leading to more costly repairs. Here, we’ll discuss the common causes of a humming garbage disposal, what you can do about it, and why seeking professional help may be the best option.
Understanding the Humming Sound
The humming noise you’re hearing is caused by the motor attempting to spin the blades but encountering resistance. If the disposal blades cannot turn, the motor will continue to run, resulting in a humming or buzzing noise. It’s essential to address the problem quickly because if the motor remains jammed for too long, it can burn out.
Common Causes of a Humming Garbage Disposal
- Jammed Disposal Blades
The most common reason for a humming garbage disposal is a jammed blade. Debris, such as food scraps, bones, or small utensils, can lodge between the blades, preventing them from moving. Even a minor blockage can disrupt the system, as the motor lacks the strength to break it down when the blades are restricted. - Worn-Out Motor
Like any appliance, garbage disposals wear out over time. If your unit is older, the motor may no longer have the capacity to handle the same amount of waste. A humming noise, in this case, could mean the motor is struggling to function. - Electrical Issues
Sometimes, a power issue may prevent the motor from receiving enough electricity to operate fully, causing the humming sound. This might be due to a tripped circuit breaker, a blown fuse, or faulty wiring, especially in older models. - Misaligned or Loose Parts
The garbage disposal has several small parts that help it function, and if any of these parts are loose or misaligned, it may hum rather than operate correctly. Misalignment can cause the impellers to malfunction, and the motor may hum without effectively moving the blades. - Overloaded Garbage Disposal
Overloading the garbage disposal with food waste or putting non-food items down the drain can cause a jam. Items like coffee grounds, bones, or fibrous vegetables should never go down the disposal. Overloading it with waste can lead to clogging, jamming, and eventually a humming sound as the motor strains.
DIY Solutions to Try
If you’re comfortable, you may be able to troubleshoot a humming garbage disposal before calling in a professional. Here are some DIY solutions:
- Use the Reset Button
Many garbage disposals have a reset button on the bottom. If your disposal is humming, try pressing the reset button and then switching it on again. This can sometimes resolve electrical issues that are causing the hum. - Unjam the Blades Manually
To unjam the disposal, turn off the unit and unplug it from the power source. Use an Allen wrench (usually included with the unit) to turn the blades manually from the bottom of the disposal. This can sometimes loosen any jammed items and restore function. Never place your hand inside the garbage disposal! - Remove Visible Obstructions
With the disposal disconnected from power, use tongs or pliers to remove any visible items that might be causing the jam, like bones or large pieces of food. Avoid reaching in with your hand, even if the disposal is off, as the blades are sharp and can be hazardous. - Check for a Circuit Breaker Trip
Sometimes the garbage disposal hums because there isn’t enough power reaching it. Check your circuit breaker and reset it if necessary.
For more detailed DIY steps, you can read guides on basic troubleshooting techniques at this resource.
When to Call a Professional
While some disposal issues can be resolved on your own, others require professional attention. Continuing to run a jammed garbage disposal can quickly burn out the motor and cause permanent damage, which may lead to a costly replacement. If you’ve tried the steps above and your disposal is still humming, it’s time to consult an expert. A professional plumber can identify the issue, clear any internal blockages, and repair or replace parts as needed.
Additionally, if the problem is related to electrical wiring, it is safer to leave the repair to someone trained. Electrical issues can be complex and may present a safety hazard if handled incorrectly.
Avoiding Future Garbage Disposal Problems
- Regular Cleaning
Cleaning your garbage disposal regularly helps prevent buildup and keeps the blades free of debris. Avoid using chemical cleaners, as they can damage the disposal. Instead, use ice cubes, baking soda, and vinegar to freshen and clean the system safely. - Be Mindful of What Goes Down the Disposal
Avoid putting fibrous foods (like celery or corn husks), grease, coffee grounds, and large bones down your garbage disposal. Non-food items, such as bottle caps or small utensils, can cause significant damage and jamming. - Run Cold Water While Operating
Running cold water while using the garbage disposal helps flush food waste down the drain and prevents overheating. Cold water also helps solidify grease, making it easier for the disposal to break down. - Use It Regularly
Regular use of the garbage disposal keeps parts moving and prevents rust. Even if you don’t have food to dispose of, running the unit briefly with cold water can keep it functioning smoothly.
Blue Planet Plumbing Serving San Diego
A humming garbage disposal is often an indicator of a jam or electrical issue that needs immediate attention. Addressing these issues quickly can prevent further damage and help your disposal last longer. Whether it’s a simple fix or a complex repair, a professional plumber can ensure your garbage disposal operates safely and efficiently.
Blue Planet Plumbing offers professional garbage disposal services in San Diego to help with everything from jams to full replacements. Don’t let a minor issue turn into a costly repair—reach out to Blue Planet Plumbing and get your disposal back to peak performance.
