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A garbage disposal that hums, jams or will not turn on can usually be repaired. A disposal that leaks from its body or has a cracked housing should be replaced. Start with the reset button and the breaker, then check for a jam. If that does not work, it is time for disposal repair in Meridian or a new unit.
Key Takeaways
- Humming but not grinding usually means a jam, which is often fixable.
- No sound at all points to the reset button, the switch or the breaker.
- A leak from the bottom of the unit usually means replace, not repair.
- Never put your hand in a disposal, even with the power off.
- On a septic system, a disposal adds solids, so the tank needs pumping more often.
Common Garbage Disposal Problems and What They Mean
Disposals give clear clues when something is wrong. Listen and look before you decide anything.
| Symptom | Likely Cause | Repair or Replace? |
|---|---|---|
| Hums but does not spin | Something is jammed between the plate and the ring | Repair. Free the jam. |
| No sound at all | Tripped reset button, breaker, GFCI or bad switch | Repair. Check power first. |
| Trips the reset button again and again | Motor overheating or a recurring jam | Often replace if it keeps happening |
| Leaks at the sink flange (top) | Loose mount or old plumber’s putty | Repair. Reseal the flange. |
| Leaks at the side hoses | Loose dishwasher hose or drain pipe connection | Repair. Tighten or replace the gasket. |
| Leaks from the bottom of the unit | Internal seal failure or cracked housing | Replace. |
| Grinds slowly or loudly | Dull or damaged parts, or a foreign object | Depends on age. Older units are often replaced. |
| Bad smell that will not go away | Food buildup in the unit or drain | Clean first. Replace if it persists. |
Safe Steps to Try Before You Call
Many disposal problems can be cleared in a few minutes. Safety comes first. A disposal has sharp parts and a strong motor.
- Turn off the switch. Then turn off the breaker for the disposal if you can find it.
- Press the reset button. It is a small red or black button on the bottom of the unit. If it was tripped, it will click in.
- Check for a jam. Look into the drain with a flashlight. Use tongs or pliers to remove anything you can see. Never use your hand.
- Turn the motor by hand. Most disposals have a hex socket in the center of the bottom. Insert the hex key that came with it and work it back and forth until it turns freely.
- Restore power and test. Run cold water, then turn on the disposal.
- Check the GFCI. If there is still no sound, check for a tripped outlet nearby and reset it.
If the disposal still hums, trips the reset over and over, or will not turn at all, stop there. Forcing it can burn out the motor.
Why Disposals Leak, and When a Leak Means Replace
Leaks under the sink are where repair turns into replacement. Dry everything off with a towel. Then run water and watch where the drips start.
Leak at the Top
Water around the sink flange means the seal between the disposal and the sink has failed. A plumber can loosen the mount, reseal it and reattach it. This is a repair.
Leak at the Side
The disposal connects to the dishwasher hose and the drain pipe on its side. Loose clamps or worn gaskets there are common and fixable.
Leak at the Bottom
Water dripping from the bottom of the unit usually means the internal seals have failed or the housing has cracked. You cannot fix that from the outside. The disposal needs to be replaced.
A small leak under a sink is easy to miss for weeks. It can soak the cabinet floor and lead to mold. If your cabinet floor is warped or soft, the leak has been there a while.
Disposal leaking or dead? Call Running Water Plumbing at (208) 405-8255. We repair and replace garbage disposals across Meridian and the Treasure Valley.
When It Makes Sense to Replace Your Disposal
Replacement is usually the better choice when:
- The unit leaks from the bottom or the housing is cracked.
- It jams or trips the reset button every week.
- The motor will not turn even after you free it with a hex key.
- It is old and loud, and repairs keep adding up.
- It is too small for your kitchen. A bigger family or more cooking may need a stronger motor.
A new disposal is often a straightforward swap if the mount fits. A plumber also checks the drain line, the dishwasher connection and the electrical hookup so the new one runs right from day one. Learn about our garbage disposal replacement service if your unit is past saving.
If the sink still drains slowly after a new disposal goes in, the clog is likely further down the line. A clogged drain plumber Meridian homeowners call can clear it.
Questions to Ask Before You Replace
Before you buy a new unit, a few questions help you get the right one:
- Does the new unit fit the existing mount? A matching mount makes the swap faster.
- Is the motor size right for your kitchen? Heavy cooks and large families need more power.
- Is the outlet or hardwired connection safe? The electrical side should be checked, not just reused.
- Is the drain line clear? A new disposal will not fix a clogged pipe further down.
Garbage Disposals on Septic Systems
Some Treasure Valley homes outside city sewer use a septic tank. If that is you, your disposal matters more than you think.
Food scraps add solids to the tank. A state septic system primer from New Jersey’s environmental agency notes that garbage disposals can increase the solids going into a septic tank by as much as 50 percent, which means more frequent pump-outs. An EPA disposal fact sheet reports that in-sink disposals raise suspended solids by 40 to 90 percent and fats, oils and grease by 70 to 150 percent.
That does not mean you cannot have a disposal on septic. It means:
- Scrape plates into the trash first and use the disposal for small scraps only.
- Keep grease and oil out of the drain completely.
- Pump the tank more often. Check our septic tank pumping schedule guide for timing.
What Not to Put Down a Garbage Disposal
Most disposal jams start with the wrong food. Keep these out:
- Grease, oil and fat. They harden in the pipes.
- Fibrous scraps like celery, corn husks and onion skins. They wrap around the parts.
- Coffee grounds and eggshells. They build up like sludge in the drain.
- Pasta, rice and bread. They swell with water.
- Bones and fruit pits. They are too hard to grind.
- Non-food items like twist ties, bottle caps and utensils.
Run cold water before, during and for a few seconds after you use the disposal. Cold water keeps any fat solid so it gets ground up instead of coating the pipe.
Garbage Disposal FAQs
What is the average life expectancy of a garbage disposal?
It depends on the motor, how often you use it and what goes down it. A unit that is used gently can last many years. If yours is older and starting to leak, jam often or run loud, replacing it is usually smarter than repairing it.
Can I replace a garbage disposal by myself?
Some handy homeowners do. It involves plumbing and electrical work, plus a dishwasher connection on most sinks. A mistake can cause leaks under the sink or an unsafe electrical hookup. If you are not sure, have a licensed plumber install it.
How much does a plumber charge to replace a garbage disposal?
The cost depends on the unit you choose and whether the mount, drain and wiring can be reused. Running Water Plumbing gives free estimates, so you will know the full price, including the new unit, before any work starts.
Why does my garbage disposal hum but not work?
Humming means the motor has power but cannot turn. Something is usually jammed inside. Turn off the power, use the hex key on the bottom to free it, press the reset button and test again. If it still hums, the motor may be failing.
Get Your Meridian Disposal Working Again
Whether your disposal hums, leaks or has quit for good, call Running Water Plumbing at (208) 405-8255. We will tell you honestly whether it is worth fixing or time to replace, and give you a free estimate before we start. You talk to the owner, we are available 24/7, and if we cannot fix it, you do not pay.
Running Water Plumbing LLC
3665 S Peoria Way, Meridian, ID 83642
Phone: (208) 405-8255
Hours: 24/7
Licensed Idaho plumber, license 074478
Serving Meridian, Boise, Eagle, Kuna, Star, Nampa, Caldwell, Garden City and the Treasure Valley
About the author: ColeBee Ransom is the owner of Running Water Plumbing LLC and a licensed Idaho plumber with over 14 years of local experience. Learn more on our about Running Water Plumbing page.