Three Reasons a Garbage Disposal Stops Working
Most disposal failures fall into one of three categories: a tripped thermal overload caused by a jam or extended run time, a seized grinding plate from a foreign object lodged in the chamber, or an electrical problem at the wall switch or outlet. Identifying which type of failure you have determines the next step and avoids unnecessary service calls.
How to Reset a Tripped Disposal
The thermal overload button is a small red or black button on the bottom of the unit. When a disposal overheats from a jam, this button pops out. Wait a few minutes for the unit to cool, then press the reset button firmly until you feel it click, and try the disposal again. If it hums but does not spin, the grinding plate is still jammed — never reach into a disposal even when the power is off.
Clearing a Jammed Grinding Plate
Most disposals ship with a hex wrench that fits a socket on the bottom of the unit. Inserting the wrench and working it back and forth manually frees a jammed plate without electrical exposure. After freeing the plate, remove any foreign material with tongs before attempting to run the unit. If no wrench was included, the typical hex size is 1/4 inch. After manual clearing, run water before turning the disposal on.
When the Disposal Cannot Be Revived
A disposal that hums but will not move after a reset and manual clearing typically has a failed motor. A disposal that leaks from the body — not just from the drain connection or mounting flange — is generally not an economic repair. Units that are over a decade old and showing these symptoms are usually better candidates for replacement than further repair.
Frequently Asked Questions
Q: What causes a garbage disposal to suddenly stop working? The most common cause is a tripped thermal overload from overloading or running without water. Jams from hard objects are the second most frequent cause. Q: What should not go into a garbage disposal? Hard or fibrous materials — bones, fruit pits, celery, artichokes — cause most jams. Grease and starchy foods contribute to drain buildup downstream. Q: How long do garbage disposals typically last? Service life varies with use and maintenance; units showing repeated jamming, motor noise, or body leaks beyond their useful years are generally more cost-effective to replace. Peregrina Plumbing handles disposal replacement as part of a standard service call.
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