What the hum is telling you
A disposal that hums but does not spin is getting power. The motor is working, but something is blocking the grinding plate, so it cannot turn. Think of it as a stalled engine rather than a dead one.
A disposal that makes no sound at all points in a different direction. That is more likely a tripped reset button, a tripped breaker or a loose electrical connection. A grinding or rattling noise that comes and goes usually means a hard object, such as a utensil, bone or bottle cap, has slipped into the chamber.
Safety first: what to do before you touch anything
Most disposal injuries come from a hand going in at the wrong moment. These rules keep that from happening.
Non-negotiables
- Turn the switch off.Flip the wall switch to off.
- Cut the power at the source.Unplug the unit under the sink if it has a plug, or switch off the breaker. A wall switch is not enough on its own.
- Never put a hand inside.Not for a spoon, not for a ring, not for a quick look. Even a powered-off disposal has sharp parts and can be restarted by someone else.
- Use tools to look and to reach.A flashlight shows what is in the chamber, and long-handled tongs or pliers can lift out an object you can see.
- Keep the water off.Stop running the faucet while you work.
If you are not comfortable with any step, stop and call a plumber. A disposal repair is not worth an injury.
Freeing a jam: the hex key method
Most disposals have a hex-shaped socket in the center of the underside. A small hex key, often supplied by the maker, fits it. If you do not have the key, a broom handle pressed against a paddle inside works on some models, but only with the power fully off.
With the power off
- Find the socket.Look under the sink and locate the hex socket at the center of the bottom.
- Insert the key and work it back and forth.Turn it side to side, then try a full rotation. The plate should move freely once the jam clears.
- Look and lift.Shine a flashlight into the chamber and use tongs to remove anything you can see.
- Press the red reset button.It is on the bottom of the unit. A tripped overload protector pops out when the motor overheats.
- Restore power and test.Plug in or flip the breaker, run cold water, and switch on the disposal for a moment.
If the hum comes back right away, the jam has not cleared or the motor has failed. Cut the power again and call.
Disposal still not working?
Call (847) 281-8626 any time and a plumber can tell you whether it needs a repair or a swap.
Symptom guide: hum, silence, leak or smell
Different symptoms point to different causes. Match yours below.
| Symptom | Likely cause | What to try |
|---|---|---|
| Hums but plate does not turn | A jam in the chamber | Power off, hex key from below, remove object, reset |
| No hum, no sound | Tripped reset, tripped breaker, or loose power | Press reset, check the breaker, check the cord |
| Reset keeps tripping | Repeated overload or a failing motor | Stop and call a plumber |
| Leak under the sink | Failed seal, loose drain connection or cracked housing | Cut the power, empty the cabinet, call for garbage disposal repair |
| Bad smell | Food residue in the chamber or drain | Cold water and a small piece of citrus, or call if it persists |
| Water backs up in the other sink bowl | A clog past the disposal | Often a job for drain cleaning |
Why disposals jam in the first place
Hard bones, fruit pits and bottle caps are the classic culprits. Fibrous stringy items, such as celery or corn husks, can wrap around the plate. Large amounts of starchy food, such as rice, pasta and potato peels, can form a paste that sticks to the chamber and the drain.
Grease is a bigger problem than it looks. It runs through as a liquid, then cools and hardens in the pipe. In Buffalo Grove, the sewer service line from the house to the village main belongs to the homeowner, and Public Works does not root-cut or camera private lines. Keeping fat out of the drain protects the line you would have to pay to clear.
Running the unit the right way
Run cold water before, during and for about 15 seconds after grinding. Feed small amounts at a time. Skip grease, coffee grounds in bulk, eggshell piles, and anything that is not food.
Repair or replace?
A jam you can clear with a hex key is a minor event. A motor that hums and will not turn after clearing the chamber, a reset that keeps tripping, or a leak from the body of the unit usually points to the end of that disposal's life.
A plumber can look at the age, the condition and the mounting, and tell you whether a repair is worth doing or a new unit makes more sense. The price depends on the unit's size and power, the mounting and plumbing connections, and whether wiring needs changes. You hear the price before the work starts.
If a new fixture or an added sink drain is part of the job, plumbing installation covers it, and a dripping kitchen tap that shares the cabinet can be handled during the same visit through faucet repair.
What this advice is based on
There is no single primary standard for garbage disposal jams, so the steps here are the general homeowner method used by manufacturers: power off, hex key from below, reset button, never a hand inside. The village facts come from Buffalo Grove's Public Works and Community Development pages.
The village states that a permit is required for plumbing work other than maintenance, servicing or repairs. Illinois plumbers are licensed by the Illinois Department of Public Health, and its online verification page lets you confirm a license.
Local note
What Buffalo Grove homeowners should know
The private sewer line is the homeowner's responsibility, and if the kitchen drain backs up beyond the disposal, call Public Works first at 847-459-2545 in business hours, or the police non-emergency line at 847-459-2560 after hours. They do not clear private lines, but they can tell you whether the main is involved.
Our dispatch line also reaches plumbers in Arlington Heights and Deerfield, where the same disposal advice holds. A disposal swap is usually plain repair work, while new drain work may involve a permit.
Questions we hear from homeowners
Something is stuck against the grinding plate. Turn off the power, free the plate with a hex key from below, and press the reset button.
No. Never put a hand inside a disposal, even with the power off. Use tongs or pliers instead.
It is a small red button on the bottom of the unit. It pops out when the motor overheats or overloads.
Many disposals come with one, and hardware stores sell them. A wooden spoon handle pressed against the plate can also work on some models, but only with the power fully off.
Run cold water while it works, feed small amounts, and keep out bones, pits, fibrous food, grease and non-food items.
Yes. The line at (847) 281-8626 is answered around the clock. A leak under the sink or a backing-up drain is worth a call right away.
Call Public Works first at 847-459-2545 during business hours to ask about the main. The sewer service line is the homeowner's, so a plumber is the one who clears it.