The most common reason: the reset button has tripped
Your garbage disposal has a red or black reset button on the bottom or side of the unit itself—not on the wall switch. When the motor overheats or jams, this button pops out automatically and cuts power to protect the disposal. Press it back in firmly until it clicks. This solves the problem in roughly half of all non-working disposals.
The reset button trips when the disposal works too hard. This happens when you feed it something it cannot grind—bones, fibrous vegetables like celery, or pasta that expands in water—or when the chamber is already full and you run it again without clearing the drain first.
If the reset button pops out again within a few minutes of pressing it, the motor itself may be failing, and you will need a replacement unit. If it stays in and the disposal still will not run, move to the next section.
Key Takeaways
- The reset button on the bottom or side of the disposal unit stops it when the motor overheats; press it firmly to restore power.
- A stuck or jammed chamber prevents the blades from turning; turn off power at the breaker, then use tongs or pliers to remove the blockage—never put your hand down the drain.
- The wall switch may be broken even though the outlet works; test the outlet with another appliance to confirm power is reaching the disposal.
- If the motor hums but the blades do not turn, the motor coupling has likely failed and the unit needs replacement.
- Grease, starch, and fibrous foods cause most jams; running cold water while the disposal runs and for 30 seconds after helps clear the drain.
The chamber is jammed and the blades cannot turn
If the reset button is in but the disposal still will not run, and you hear nothing when you flip the switch, the blades may be stuck. Turn off the wall switch and then switch off the circuit breaker that controls the disposal—this is the only safe way to work on it. Do not rely on the switch alone.
Shine a flashlight down the drain opening and look for visible objects: bones, fruit pits, glass, utensils, or food scraps wedged between the blades. Use needle-nose pliers or tongs to pull out anything you can see. Work from above; never put your hand or fingers into the chamber. If you cannot reach the blockage, you may need a plumber.
Once you have removed the jam, turn the breaker back on, press the reset button again if it has popped, and test the disposal. If it still will not run, the motor itself may be damaged from the jam.
The wall switch is broken or power is not reaching the unit
The disposal may be working but the switch controlling it may be dead. To test this, turn off the disposal switch and plug a lamp or phone charger into the outlet directly below the switch (if there is one). If the lamp does not turn on, the outlet has no power. If the lamp turns on, the outlet works but the switch does not.
If the outlet has no power, check the circuit breaker panel in your home. Look for a breaker labeled "kitchen" or "disposal" that is in the middle position or switched to "off." Flip it fully off, then back on. This resets the breaker. If it trips again when ready, there is a short circuit and you need an electrician.
If the outlet works but the switch does not, the switch itself has failed. A new switch costs $15 to $30 and takes 10 minutes to replace if you are comfortable with basic wiring, or you can call an electrician. Turn off the breaker before touching any wires.
The motor hums but the blades do not spin
If you hear the motor running but feel no vibration and the blades do not turn, the motor coupling has likely failed. The coupling is the rubber and metal piece that connects the motor shaft to the grinding chamber. When it wears out, the motor spins but the blades stay still.
This is not a jam—you will not see anything blocking the chamber. The disposal will hum steadily when you turn it on, but nothing happens. A failed coupling cannot be reset or fixed; the disposal needs replacement. This is a common failure point after five to ten years of use.
Grease and starch buildup is slowing the drain
Sometimes the disposal runs but drains very slowly or backs up into the sink. This is usually grease, starch, or food particles accumulating in the drain line below the disposal, not in the disposal itself. Cooking oil, butter, and potato starch solidify as they cool and trap other food scraps.
Run the disposal with cold water for 30 seconds after each use to flush debris down the line. Do not pour grease down the drain at all—let it cool in the pan, wipe it out with a paper towel, and throw it in the trash. If the drain is already slow, pour boiling water down it (after removing any standing water) or use a plunger over the drain opening to dislodge the clog.
If boiling water and plunging do not work, the clog is deeper in the drain line and a plumber will need to snake it. This is not a disposal problem but a drain problem.
You are feeding it foods it cannot handle
Garbage disposals grind soft to medium-firm foods. They do not grind bones, shells, pits, fibrous vegetables, pasta, rice, or anything starchy. Feeding these items causes jams that trip the reset button or damage the motor coupling over time.
Celery, corn husks, onion skins, and carrot peels wrap around the blades and jam them. Chicken and fish bones are too hard. Pasta and rice expand in water and clog the drain. Fruit pits and avocado pits will not break down. Throw these into the trash or compost instead.
Soft foods like cooked vegetables, fruit scraps, and leftover meat are fine. Run cold water while the disposal runs and for 30 seconds after to help everything move through the drain smoothly.
The disposal is old and the motor is failing
If the reset button keeps tripping within minutes, or if the motor hums but the blades do not turn, the motor itself is wearing out. Most disposals last five to fifteen years depending on how often they run and what goes into them. Once the motor begins to fail, repair is usually not worth the cost—replacement is the better choice.
A new disposal unit costs $150 to $400 depending on the brand and power. Installation takes one to two hours if you are comfortable with plumbing, or a plumber can install it for $200 to $400 in labor. If your disposal is more than ten years old and stops working, replacement is usually the practical path forward.
Frequently Asked Questions
Can I fix a garbage disposal myself or do I need a plumber?
You can safely remove a visible jam, press the reset button, or test the wall switch yourself. Anything beyond that—replacing the switch, removing a deep clog, or installing a new unit—requires either plumbing knowledge or a professional. If you are not sure, call a plumber; the cost of a service call is less than the cost of a damaged motor or electrical injury.
What should I never put down a garbage disposal?
Never put bones, shells, pits, fibrous vegetables (celery, corn husks), pasta, rice, grease, or anything hard or starchy down the disposal. These jam the blades, clog the drain, or damage the motor. Throw them in the trash or compost instead.
How do I know if the motor is broken versus just jammed?
If the disposal is silent when you flip the switch, it is jammed or has no power. If it hums but does not spin, the motor coupling has failed. If the reset button pops out repeatedly within minutes, the motor is overheating and failing. A jammed disposal can be fixed; a failed motor cannot.
Why does my garbage disposal smell bad?
Food scraps trapped in the chamber or drain line rot and create odor. Run the disposal with cold water for 30 seconds after each use, and pour boiling water down the drain once a week. You can also grind ice cubes and lemon peels to clean the chamber, but this does not replace regular flushing with water.
Is it safe to put my hand down the garbage disposal to remove something?
No. Even with the switch off, the disposal can turn on if someone else flips the switch, or if the motor is faulty. Always turn off the circuit breaker before reaching into the chamber, and use pliers or tongs to remove objects. Your hand does not belong in a garbage disposal under any circumstance.