A humming garbage disposal can be frustrating, especially when it refuses to grind food waste. The humming noise usually means the unit receives power but isn’t spinning, often due to a jammed flywheel, overheating, or a motor issue. Before assuming the worst, try these simple troubleshooting steps to get your disposal working again.
Common Causes of a Humming Garbage Disposal
- Jammed Flywheel – One of the most common reasons for a humming garbage disposal is a jammed flywheel. When food scraps, grease, or foreign objects (like utensils) block the blades, the motor struggles to rotate, causing that distinct humming sound.
- Overheating or Overloading—If the disposal has been overloaded with food waste, it may overheat and shut off as a safety precaution. In this case, it might need a reset before functioning correctly again.
- Motor or Electrical Issues—If you’ve reset the disposal and checked for jams, but it still hums without grinding, the motor may fail. If the motor has wholly burned out, a new garbage disposal installation is necessary.
Steps to Fix a Humming Garbage Disposal
1. Turn Off the Power – Before doing anything, turn off the disposal at the wall switch and unplug it. If you can’t unplug it, shut off the power at the breaker to prevent accidents.
2. Check for a Jam – Shine a flashlight inside the disposal to look for stuck food, bones, or foreign objects. Use pliers or tongs (never your hands) to remove anything blocking the blades.
3. Press the Reset Button – Locate the tiny red reset button on the bottom of the disposal. Press it firmly—this will reset the unit if it has overheated.
4. Use an Allen Wrench to Free the Flywheel – There’s a hex key slot for an Allen wrench at the bottom of the unit. Insert the wrench and manually turn it back and forth to free the flywheel.
5. Restore Power and Test It – Plug the disposal back in and run cold water while switching it on. If it still hums but doesn’t grind, the issue may require professional help.
When to Call a Professional
If your disposal still doesn’t work after troubleshooting, it may be time to call a garbage disposal repair service. A professional plumber can assess whether the motor can be repaired or if a complete replacement is better.
For older units that frequently jam, struggle to grind food, or leak, replacing the disposal might save you more time and money in the long run. Many garbage disposal companies offer high-efficiency models designed to handle more food waste while lasting longer.
No matter the issue, having a disposal that works when needed is key to keeping your kitchen running smoothly. That’s where High Priority Plumbing comes in. From block and leak detection to garbage disposal jetting, repair, and replacement, our team provides honest recommendations and expert service so you’re never left guessing. Whether a quick fix or a complete garbage disposal installation, we prioritize quality work and lasting solutions. Contact us today for more information or to schedule an appointment!