Fix a Humming Garbage Disposal: Troubleshooting & Repair
About This Project
This DIY guide helps you fix a humming garbage disposal. First, for safety, disconnect power at the breaker, switch, and outlet. Then, insert a disposal wrench in the bottom hole, turning to free any jams. Inspect with a flashlight, removing debris with tongs or pliers. Finally, restore power, run cold water for a minute, listen for unusual sounds. If the humming persists, contact a plumber. If it works, run ice cubes to clean the blades.
Best for homeowners and DIY enthusiasts.
Tools & Materials
Wrench
Panther Vision FLATEYE F-310 High Performance 310-Lumen Unround Flashlight CREE LED Multi Position Waterproof and Shockproof FL-6960
Crescent 10 in. V-Jaw Tongue and Groove Pliers with Dipped Grips RT410CVN-05
Water
Wrench
Turns objects with grip and leverage.
Panther Vision FLATEYE F-310 High Performance 310-Lumen Unround Flashlight CREE LED Multi Position Waterproof and Shockproof FL-6960
Every revolution starts with a spark. At 310-Lumens the F-310 has the power to ignite our un-round revolution without overpowering your needs or your wallet. Not your granddads flashlight these bad boys
Crescent 10 in. V-Jaw Tongue and Groove Pliers with Dipped Grips RT410CVN-05
The Crescent Tongue and Groove Pliers are versatile utility pliers, ideal for objects of all shapes and sizes. They are forged from alloy steel and precision machined for long life and durability. The
Water
Essential for life and countless tasks.
Steps
Safely Disconnect Power to the Garbage Disposal
2 minsBefore beginning any repairs, prioritize safety. Turn off the power to the garbage disposal at the circuit breaker. Then, locate the power switch under the sink and switch it off. Double-check the power is off by trying to turn on the disposal. For added safety, unplug the unit from the electrical outlet.
Watch: Shut Off Power
Free the Jammed Garbage Disposal Motor
5 minsLocate the reset hole at the bottom of the disposal unit. Insert a garbage disposal wrench into this hole. Gently rotate the wrench back and forth to free the motor shaft. You should feel resistance at first, then the motor will turn once the obstruction is cleared.
Watch: Clear the Clog
Final Testing and Next Steps
2 minsRun the garbage disposal with cold water for a minute or two. Listen for any unusual sounds. If the humming persists or new sounds emerge, immediately turn off the power and contact a qualified plumber for professional assistance. If all is working well, consider running ice cubes through the unit to clean and sharpen the blades.
Watch: Clean Blades with IceCommon Problems
Safety concern: Always disconnect the power to the garbage disposal before working on it.
Solution: Take proper safety precautions. Always disconnect the power to the garbage disposal before working on it.
Prevention: Always follow safety guidelines before starting the project.
Can't find the reset button to fix a humming disposal.
Solution: A flashlight will be very helpful for locating the hole and reset button on the bottom of the unit.
If the wrench key is difficult to turn, apply steady pressure. Do not force it so hard that you strip the socket or break the wrench.
Solution: To avoid this issue: Be mindful of this warning and take appropriate precautions.
The initial troubleshooting steps for a humming garbage disposal are proving ineffective or require specialized tools.
Solution: This method may be easier if the top method is not working or if you have the specific tool.
Garbage disposal stuck and humming, but no reset button works.
Solution: Most garbage disposals come with this tool. If you've lost it, a 1/4 inch Allen wrench is often a suitable replacement.
Always attempt to clear a jam using this method from underneath before trying to clear it from inside the sink.
Solution: To avoid this issue: Be mindful of this warning and take appropriate precautions.
Do not reach into the disposal chamber with your bare hands.
Solution: To avoid this issue: Be mindful of this warning and take appropriate precautions.
Frequently Asked Questions
My garbage disposal is humming but not grinding. What's the very first thing I should do before attempting any repairs?
The absolute first step is to prioritize safety by disconnecting all power sources to the disposal. This includes flipping the circuit breaker, turning off the wall switch, and unplugging it if accessible. This prevents accidental activation while you're working inside the unit.
I don't have a specific 'disposal wrench' or Allen wrench for the bottom hole. Can I use a different tool to free the jam?
While a dedicated disposal wrench or a 1/4-inch hex Allen wrench is ideal for the bottom hole, you can also try turning the grinding plate from the top using a wooden broom handle. For removing debris from the drain opening, long-handled tongs or needle-nose pliers are essential. Never use your hand for this task.
I used the wrench and removed visible debris, but my disposal is still humming after I restore power. What should I do next?
If humming persists after clearing a jam and restoring power, the motor might be overheated. Allow it to cool for 15-20 minutes, then press the red reset button usually found on the bottom of the unit. If it still hums or doesn't turn on, the motor might be seized or burned out, indicating it's time to contact a plumber or consider replacement.
What's the safest way to remove debris from inside the disposal, especially if I can't see it well?
Always ensure power is disconnected before inspecting the disposal's interior. Use a flashlight to illuminate the chamber and then carefully remove any obstructions with long-handled tongs or needle-nose pliers. Never use your bare hands, as the grinding components are sharp, even when not moving.
How difficult is this repair for a beginner, and what if it takes longer than the estimated 60 minutes?
This repair is considered beginner-friendly, primarily involving basic safety steps and mechanical freeing of a jam. While the estimate is 60 minutes, take your time, especially with safety precautions. If you encounter unexpected difficulties, the issue isn't resolved, or you feel uncomfortable, it's always best to call a qualified plumber.
After successfully fixing the jam, what's a good way to maintain my disposal and prevent future humming issues?
To keep your disposal running smoothly, regularly grind small batches of ice cubes and citrus peels (like lemons or oranges). This helps sharpen the blades, scour the grinding chamber, and remove odors. Always run plenty of cold water before, during, and for about 30 seconds after using the disposal to flush waste effectively.
