Troubleshooting Guide: Why is Your Garbage Disposal Humming but Not Working?

Appliance Medic
3 min readMar 22, 2024

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A garbage disposal is a handy kitchen appliance designed to shred food waste into small particles, preventing clogs and keeping your sink clean. However, encountering a situation where your garbage disposal is humming but not working can be frustrating. This issue typically indicates that something is obstructing the disposal blades or impeding their movement. Fortunately, with a systematic approach to troubleshooting, you can often identify and resolve the problem yourself. In this guide, we’ll explore common reasons why your garbage disposal may be humming but not working and provide step-by-step solutions to help you get it back to functioning smoothly.

1. Electrical Issues: The first thing to check when your garbage disposal is humming but not working is its power supply. Ensure that the disposal is plugged in securely and that the circuit breaker or fuse controlling it hasn’t tripped or blown. If the power supply is intact, move on to the next troubleshooting steps.

2. Reset the Disposal: Many garbage disposals are equipped with a reset button, usually located on the bottom or side of the unit. Pressing this reset button can often resolve minor issues and restore the disposal’s operation. If the disposal was overloaded or overheated, resetting it may clear the problem.

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garbage disposal humming

3. Clearing Blockages: Inspect the disposal chamber with a flashlight to identify any visible obstructions such as food scraps, utensils, or foreign objects. Using tongs or pliers, carefully remove any debris that may be jamming the disposal blades. Be cautious not to insert your hand into the disposal chamber to avoid injury.

4. Manual Rotation of Blades: If the disposal blades are jammed and unable to rotate freely, you can attempt to manually rotate them using an Allen wrench or hex key. Insert the wrench into the center opening at the bottom of the disposal and turn it clockwise and counterclockwise to free the blades. Alternatively, you can try using a wooden or plastic utensil to rotate the blades manually.

5. Lubricate Moving Parts: Over time, the moving parts of your garbage disposal may become stiff or seized up due to lack of lubrication. Applying a small amount of food-grade lubricant to the disposal’s moving parts can help loosen them and restore proper function. Be sure to use a lubricant that is safe for use with food contact surfaces.

6. Check the Flywheel: The flywheel is a rotating component inside the disposal that connects to the motor shaft and drives the blades. If the flywheel becomes stuck or jammed, it can prevent the disposal from operating properly. Carefully rotate the flywheel using a wrench or utensil to ensure it moves freely.

7. Inspect the Motor: If none of the above steps resolve the issue, there may be a problem with the disposal’s motor. In some cases, the motor may be damaged or worn out, preventing the disposal from operating. If you suspect a motor issue, it’s best to contact a professional plumber or appliance repair technician for further diagnosis and repair.

In conclusion, a garbage disposal humming but not working can be a frustrating issue to deal with, but with the right troubleshooting steps, you can often identify and resolve the problem yourself. By following the tips outlined in this guide, you can effectively troubleshoot your garbage disposal and get it back to working order in no time. Remember to always exercise caution when working with electrical appliances and consult a professional if you’re unsure or uncomfortable performing any repairs yourself.

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Appliance Medic

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