Knowing how to reset a garbage disposal is one of the simplest home repairs you can learn. When a disposal stops working — no hum, no sound at all when you flip the switch — the internal thermal overload has likely tripped. This built-in safety feature shuts the motor down to prevent overheating and burnout. The fix takes about 30 seconds and requires no tools, no plumber, and no parts.
Why Garbage Disposals Need Resetting
The thermal overload trips when the motor is forced to work harder than it should. Common triggers include grinding too much food at once, running the disposal without water, jamming from a bone or utensil, or letting the motor run continuously for more than 60 seconds. When the overload trips, the disposal goes completely silent — it will not hum, vibrate, or respond to the wall switch at all.
This is different from a jammed disposal, which hums loudly but the blades do not spin. A jam requires a different fix (covered below). If there is zero sound when you flip the switch, the reset button is your first step.
Locate the Reset Button
Every garbage disposal has a small reset button on the bottom of the unit. Open the cabinet under your sink and look at the underside of the disposal canister. The reset button is typically a small red or black button, about 1/4 inch in diameter, located on the center bottom or slightly off-center.
On InSinkErator models (the most common brand, found in roughly 70% of American homes), the button is red and centered on the bottom. Waste King and Moen disposals also place the reset button on the bottom but it may be black. If you cannot find it, check your model’s manual or look for a small circular indentation on the underside of the unit.
Step-by-Step Reset Process
- Turn off the wall switch. Make sure the disposal switch is in the OFF position. If your disposal is controlled by a switch under the sink, flip that off as well. Never put your hand inside the disposal opening at any point during this process.
- Wait 3-5 minutes. The thermal overload needs time to cool down. If you press the reset button immediately, it may not stay engaged because the motor is still too hot.
- Press the reset button firmly. Reach under the disposal and push the button until you feel it click and stay in place. If it pops back out immediately, the motor has not cooled enough — wait another 5 minutes and try again.
- Turn on cold water. Run cold water from the faucet into the disposal before turning it on. Water lubricates the grinding components and carries waste down the drain.
- Flip the switch. Turn the disposal on. It should run normally. If it hums but the blades do not spin, you have a jam (see below). If nothing happens at all, check the circuit breaker.
What to Do If the Disposal Is Jammed
A jammed disposal hums when you turn it on, but the impeller plate cannot rotate. This is a separate issue from a tripped overload, but jams often cause the overload to trip afterward. Here is how to reset a garbage disposal that is both jammed and tripped.
- Turn off the switch and unplug the unit (or turn off the breaker if it is hardwired).
- Insert a 1/4-inch Allen wrench into the hex socket on the bottom center of the disposal. Most InSinkErator models include a hex socket specifically for this purpose. Turn the wrench back and forth to free the jammed impeller. You should feel resistance break free after a few turns.
- If there is no hex socket, use a disposal wrench or a wooden broom handle inserted from the top to manually rotate the impeller plate. Never use your hand.
- Remove the obstruction. Using long-handled tongs or pliers, reach into the disposal from the top and remove whatever caused the jam — common culprits are fruit pits, small bones, broken glass, or silverware that fell in.
- Press the reset button, run cold water, and test the disposal.
When the Reset Button Does Not Work
If pressing the reset button does not restore power and the circuit breaker is not tripped, the disposal may have a more serious electrical issue. Check these possibilities.
- Tripped circuit breaker: Garbage disposals run on a dedicated 15-amp or 20-amp circuit. Check your electrical panel for a tripped breaker labeled “disposal” or “kitchen.”
- Faulty wall switch: The switch itself can fail. To test, turn off the breaker, remove the switch plate, and use a multimeter to check continuity when the switch is in the ON position. A new switch costs $3-$8.
- Burned-out motor: If the disposal smells like burned electrical insulation, the motor windings have likely failed. A burned motor cannot be repaired — the entire unit needs replacement.
- Failed reset button: In rare cases, the thermal overload mechanism itself fails. This also requires full unit replacement.
When to Replace Instead of Reset
A garbage disposal that needs resetting more than once a month has an underlying problem. Either you are routinely overloading it, or the motor is wearing out and overheating under normal loads. Most disposals last 8-12 years depending on usage and model quality.
A basic 1/3 HP disposal (InSinkErator Badger 5) costs $80-$110 and handles light kitchen use. A 3/4 HP mid-range model (InSinkErator Evolution Compact) runs $180-$250 and handles tougher scraps with less jamming. For heavy use, a 1 HP unit like the InSinkErator Evolution Excel ($350-$400) grinds everything short of large bones and has a significantly lower jam rate. Professional installation adds $100-$200 to any model.
Maintenance Tips to Avoid Future Resets
Following these practices will keep your disposal running smoothly and reduce the frequency of overload trips.
- Always run cold water before, during, and for 15 seconds after grinding. Cold water solidifies grease so the disposal can chop it up instead of letting it coat the drain pipes.
- Feed waste gradually. Push food into the disposal a little at a time rather than dumping an entire plate at once. Overloading is the number one cause of jams and overheating.
- Avoid fibrous foods: Celery stalks, corn husks, artichoke leaves, and asparagus wrap around the impeller and cause jams. Toss these in the compost or trash.
- Never grind grease or oil. Liquid grease solidifies in the drain pipe and creates blockages over time.
- Clean monthly: Grind a handful of ice cubes and a half cup of rock salt to scour the grinding chamber. Follow with lemon or orange peels to deodorize.
Learning how to reset a garbage disposal saves you the cost and wait time of a service call for what is usually a 30-second fix. Keep a 1/4-inch Allen wrench under the sink so you are always ready to clear a jam, and follow the maintenance tips above to minimize how often you need either fix.
