Garbage Disposal Humming, Jammed or Leaking in Boulder?
A garbage disposal sits under the sink and fails in obvious ways: a hum, a jam, a leak or a slow drain. Most of those can be cleared in a few minutes, and some call for a new unit.
A plumber can tell which is which and check that the drain below is not the real problem.
- Licensed and insured plumbers
- Same-day service when available
- 24/7 emergency dispatch
Humming, jammed or silent: what is going on
A disposal that hums but does not spin is jammed. A disposal that does nothing at all has lost power or tripped its reset. A disposal that spins but drains slowly has a clog beyond the unit.
| Symptom | Likely cause | First step |
|---|---|---|
| Humming, blades will not turn | Jammed by a hard object | Power off, turn blades by hand with the hex key |
| Nothing happens at the switch | Tripped reset or breaker | Press the reset button, check the breaker |
| Runs but the sink drains slowly | Clog below the disposal | Do not add water; call a plumber |
| Smelly with grease residue | Buildup on blades and in the trap | Clean the unit; check the trap |
| Water under the sink | Leaking flange, drain or body | Find the source, then repair or replace |
A reset button on the bottom of the unit pops out when the motor overheats. If it trips again right away, the motor is struggling and the unit is near the end of its life.
Leaks under the sink: three places to look
Water under a disposal comes from one of three places. The sink flange at the top, the drain connections at the side, or the body itself. Dry the area, run water and watch where the first drop appears.
- Top of the unit: sink flange putty or gasket worn out
- Side connections: dishwasher hose or drain pipe loosened
- Bottom or body seam: housing cracked, the unit is finished
- Drain trap and tailpiece: slip joint or washer worn
- Supply to a faucet or hot water dispenser nearby
A flange or connection leak is repaired in one visit. A body leak means replacement. A plumber can usually fit a new unit with the existing electrical connection, and the old mounting often accepts the new one.
Disposal jammed or leaking? Call
Describe the sound and the leak, and a plumber serving your area can bring a replacement if needed.
☎ Call (303) 567-7524Repair or replace the unit?
A disposal is a small motor in a metal housing, and it wears out. Repair makes sense when the jam is cleared, the flange is resealed or a connection is tightened. Replacement makes sense when the body leaks, the motor will not run or the unit is old and noisy.
- Clear the jam or reset the unit and see if it runs.
- Check the connections for leaks and tighten or replace them.
- If the body leaks or the motor fails, plan a replacement.
- Choose a horsepower that fits the household's use.
- Have the plumber reconnect the dishwasher drain correctly.
A larger motor handles more scraps, while a smaller one is enough for a small household. The plumber matches the unit to the sink and the mounting.
Dishwasher connections and drain clogs behind the disposal
The dishwasher usually drains through the disposal. A knockout plug left in the disposal inlet after installation blocks the dishwasher drain, which shows up as dirty water in the dishwasher. A loop or air gap in the drain hose keeps dirty water from flowing back toward the sink.
If the sink is clogged or backed up with the disposal running, or both sinks back up, the clog is past the disposal and the drain line needs attention. A plumber can run a cable through the trap and check the branch line, and the drain page covers the next steps.
Sink backed up past the disposal? Call
A plumber can run a cable through the trap and test the dishwasher drain.
☎ Call (303) 567-7524Disposal questions for Boulder kitchens
Why is my garbage disposal humming but not spinning?
A hum with no spin means the motor has power but the blades cannot turn. Something is jammed, often a bone, a utensil or a fruit pit. Turn off the switch, and with the unit unplugged or the breaker off, use the hex slot under the unit to turn the blades by hand. If it still will not move or keeps tripping the reset button, a plumber should look at it.
Do I need a plumber for garbage disposal repair?
Not always. A jam or a tripped reset button is often a homeowner fix. A leak from the body, a motor that will not run or a sink that backs up through the disposal calls for a plumber, because the problem may be in the drain or in the unit's housing.
My disposal is leaking. Can it be fixed or does it need replacing?
It depends on where the water comes from. A leak at the sink flange or a drain connection is a repair. A leak through the body of the unit means the housing has cracked or the seals have failed, and the unit has to be replaced. A plumber checks the connections first before condemning the unit.
What should never go down a garbage disposal?
Grease, coffee grounds, eggshells, bones, fibrous scraps such as celery, and anything that is not food. These jam blades or settle in the drain and harden. The city's compost guidance covers many of them, since it accepts food scraps including meat, bones, dairy, coffee grounds and eggshells.
If the sink problem is bigger than the unit
Backups across several fixtures call for drain cleaning. A leaking faucet or supply valve is a fixture repair matter. Water that reached the cabinet floor may need drying, and a hidden drip behind the cabinet is a leak search.
Disposal dead or leaking? Call a plumber
Say what it is doing and a plumber serving your area can come with parts.
☎ Call (303) 567-7524- Licensed and insured plumbers
- Same-day service when available
- 24/7 emergency dispatch