Garbage Disposal Not Working? Fixes to Try First

If your garbage disposal is dead, start with the red reset button on the bottom of the unit; a tripped internal breaker is the most common cause and it fixes a surprising number of no-power disposals in seconds. If it hums but will not spin, the flywheel is jammed, and you clear it by turning the unit manually with a hex wrench from underneath. These two fixes solve most disposal problems without a service call.

At King of Prussia Plumbing Pros, we are glad to come out, but we would rather you save the money when the fix takes two minutes. Here is the safe, in-order checklist we would run ourselves, followed by the point where it is genuinely time to call.

If It Does Nothing at All (No Sound)

Silence means the motor is getting no power. Work through the electrical causes before assuming the unit is dead.

1. 1Check the switch and that it is plugged in. It sounds obvious, but a bumped plug under the sink is a frequent culprit.
2. 2Press the reset button. On the bottom of the unit there is a small red (sometimes black) button. If it has popped out, push it firmly back in and try again.
3. 3Check your home's breaker panel. A tripped circuit breaker cuts power to the disposal and often the outlets around it. Reset it if it has tripped.
4. 4Test the outlet. If a GFCI outlet nearby has tripped, reset it; disposals are often on a protected circuit.

If It Hums But Does Not Spin

A hum with no grinding means the motor has power but the flywheel is jammed, usually by a bone, a fruit pit, a shell, or a piece of silverware. Do not let it keep humming, because that overheats and burns out the motor. Switch it off at the wall and unplug it first.

1. 1Find the hex wrench. Most disposals come with a small Allen wrench, and there is a hex-shaped socket in the center of the bottom of the unit.
2. 2Work the flywheel free. Insert the wrench into that socket and turn it back and forth to manually rotate the grinding plate and break the jam loose.
3. 3Remove the object. With power still off, use tongs or pliers, never your fingers, to fish out whatever was stuck.
4. 4Restore power and press reset, then run cold water and test the unit in short bursts.

If It Leaks or Drains Slowly

A disposal that runs fine but leaks or drains poorly is a different problem. Leaks commonly come from the sink flange on top, the dishwasher hose connection, or the drain pipe below, and the fix depends on which. A slow drain under a disposal is usually a clog in the trap or branch line downstream, not the disposal itself. If resetting and clearing the chamber has the unit spinning but the sink still backs up, the issue is the drain line, and that is where our drain cleaning work comes in rather than disposal repair.

A quick way to tell a disposal problem from a drain problem: fill the sink, pull the stopper, and watch. If the water sits and drains slowly even when the disposal spins freely, the restriction is downstream in the trap or branch, not in the unit. If the disposal itself is the thing that will not run, that is a motor, power, or jam issue. Separating the two before anyone opens a wallet saves you from replacing a perfectly good disposal when the real culprit was a greasy trap below it.

When to Call a Pro

Call when the reset button will not stay in or trips again immediately, when the unit stays silent after you have checked power and breaker, when it leaks from the body of the unit itself, or when it is simply old and rusting through. Our garbage disposal repair and replacement service handles the jobs that are past a DIY reset, and when the disposal has failed for good we swap it for a properly sized, properly wired new one. We also handle the connected plumbing, so if the real issue turns out to be the sink drain or a worn basket strainer, our kitchen fixture repair covers that too.

From the Field: What Kills Disposals Early in Our Area

Most disposals we replace did not die of old age; they were fed things that no disposal handles well. The worst offenders are fibrous scraps like celery and corn husks that wrap the flywheel, starchy loads like potato peels and pasta that turn to paste, and grease poured down with hot water that congeals in the trap below. Coffee grounds and eggshells build a sludge that our hard, roughly seven-grain water only helps cement in place. Across kitchens in Montgomery County, that combination accounts for most of the jams and slow drains we clear.

The habit that actually extends a disposal's life is cold water and patience. Run cold water before, during, and for a good fifteen seconds after grinding, feed scraps in small amounts rather than packing the chamber, and skip the fibrous and starchy items entirely. Cold water keeps fats solid so they flush through instead of coating the pipe. People assume hot water helps; it does the opposite, melting grease that then re-hardens downstream where you cannot reach it. Small habits here save both the motor and the drain line.

Run the reset and the hex-wrench steps first, and you will fix most disposals yourself in a couple of minutes. When the unit stays dead, keeps tripping, leaks from its body, or the sink still backs up after it spins, call King of Prussia Plumbing Pros at (831) 290-4327. We will get the disposal and the drain beneath it working right, and tell you honestly whether it is worth repairing or time to replace.