Garbage Disposal Reset Button Not Working: Troubleshooting
The reset button on a garbage disposal is a thermal overload protector. When the motor overheats from a jam, overload, or prolonged operation, this switch automatically trips to prevent motor damage. It is designed to pop out (disconnect) when the motor gets too hot and stay in (reconnect) once the motor has cooled. If the button will not stay engaged, you need to figure out why the motor is still overloaded or whether the motor itself has failed.
Step 1: Wait for the Motor to Cool Completely
This is the most overlooked step. The thermal overload will not reset until the motor temperature drops below its trip threshold. After the disposal stopped working, turn off the wall switch and wait at least 15 to 20 minutes. Do not attempt to press the reset button during this cooling period. If you try too soon, the button will feel springy and pop right back out because the internal temperature is still too high.
During the wait, do not run any water through the disposal. Running water while the motor is overheated can sometimes help cooling, but it also means the motor may try to restart if the switch resets momentarily, which extends the overheating cycle. Let the unit sit completely idle for the full cooling period.
Step 2: Clear Any Jam Before Resetting
The most common reason a disposal overheats and trips the reset button is a jammed flywheel. The motor draws maximum current while trying to spin a stuck flywheel, which generates heat rapidly. If you reset the button without clearing the jam, the motor will immediately overload again and trip within seconds.
Turn off the wall switch and unplug the disposal or shut off the circuit breaker. Insert a 1/4-inch Allen wrench into the hex socket on the bottom of the unit and rotate it back and forth until the flywheel moves freely. Use tongs or pliers to reach into the grinding chamber from above and remove any obstruction. Only after the flywheel spins freely should you attempt to press the reset button.
Step 3: Check the Circuit Breaker
If the disposal makes no sound at all (no hum, no click) even after pressing the reset button, the problem may be in the electrical supply rather than the disposal itself. Go to your electrical panel and check whether the kitchen circuit breaker has tripped. A tripped breaker will be in the middle position between on and off, or may appear to be in the on position but feel loose.
Reset the breaker by flipping it fully to the off position, then back to on. If the breaker trips again immediately when you turn on the disposal, there is likely a short circuit in the disposal's wiring or the motor itself. Do not continue resetting a breaker that trips repeatedly, as this indicates a potentially dangerous electrical fault that requires professional diagnosis.
Step 4: Test the Electrical Outlet
If the breaker is fine but the disposal still shows no signs of life, test the outlet under the sink. Plug a small appliance (a lamp, phone charger, or hair dryer) into the same outlet to confirm power is reaching the disposal's plug. If the outlet is dead, it may be controlled by a GFCI (Ground Fault Circuit Interrupter) outlet elsewhere in the kitchen or laundry room.
Look for GFCI outlets (the ones with Test and Reset buttons) in the kitchen, bathroom, or garage. A tripped GFCI can cut power to multiple outlets on the same circuit, including the one under the sink. Press the Reset button on any tripped GFCI outlet and check the disposal outlet again. Many homeowners do not realize their disposal outlet is downstream of a GFCI in another room.
If the disposal is hardwired rather than plugged in, you will not be able to test the outlet with another appliance. In this case, you need a voltage tester or a multimeter to verify power at the wire connection. This is a task best left to an electrician or plumber with electrical training.
Step 5: Press the Reset Button Firmly
With the jam cleared and the motor cooled, locate the red reset button on the bottom of the disposal. It is usually a small button about the size of a pencil eraser. Press it firmly until you feel and hear a distinct click. The button should stay flush with the surface of the disposal body. If it clicks and stays in, restore power, run cold water, and turn on the disposal to test.
If the button pops out immediately after pressing or within a few seconds of turning on the disposal, the thermal overload is tripping because of an underlying problem. At this point, the likely causes are a motor with failing windings (drawing excessive current), a bearing that has seized or is nearly seized, or a persistent jam that was not fully cleared. If you have confirmed the flywheel spins freely with the hex wrench and the button still will not stay engaged, the motor is likely failing and the disposal needs replacement.
When the Reset Button Itself Is Broken
In rare cases, the thermal overload switch (the mechanism behind the reset button) fails mechanically. The button may feel mushy with no click, may not pop out at all even when the motor overheats, or may stick in the out position regardless of motor temperature. A failed overload switch is a safety concern because it either fails to protect the motor (if it will not trip) or prevents the disposal from operating at all (if it stays tripped).
Replacement of the thermal overload switch is not a standard DIY repair, as it requires access to the motor housing internals. For most residential disposals, a failed overload switch is a practical end-of-life indicator, and replacement of the entire unit is the recommended course of action. The switch is a $10 to $20 part, but the labor to access and replace it approaches the cost of installing a new disposal.
What a Plumber Charges for This Problem
A plumber's visit to diagnose and fix a disposal that will not reset typically costs $75 to $200. If the problem is a jam plus a tripped reset (the most common scenario), the plumber clears the jam, presses the reset button, tests the unit, and you are done for $75 to $150. If the motor is failing and replacement is needed, the plumber will quote the replacement on the spot. Most plumbers carry common disposal models on their truck and can complete the replacement during the same visit, saving you a second service call.
If the issue turns out to be electrical (a tripped GFCI, a wiring fault, or a breaker problem), the plumber may need to bring in an electrician or handle the electrical work themselves if they hold an appropriate license. Electrical diagnosis adds $75 to $150 to the visit, and any wiring repairs are quoted separately.
The reset button usually will not stay in because the motor has not cooled enough or a jam has not been cleared. Wait 15 to 20 minutes, clear any jam with the hex wrench, check the breaker and GFCI outlets, then press the button firmly. If it still pops out with a clear flywheel and cool motor, the motor is failing and the unit needs replacement.