Fixtures
Why Won't My Garburator Turn On, and What Do the Common Problems Mean?
Most garburator problems — humming without spinning, jams, leaks, or bad smells — come down to a stuck flywheel, a tripped reset button, or the wrong stuff going down the drain, and many are fixable without a service call.
If your garburator hums but won't spin, it's almost always a jam — something is caught between the spinning plate and the grinding ring, and the motor doesn't have enough force to push through it on its own. If it's completely silent and doesn't even hum, the more likely cause is a tripped reset button or a tripped breaker. Both of these are things a homeowner can usually check before assuming the unit needs replacing.
Why does my garburator hum but not spin?
A hum without spinning means the motor is getting power but the flywheel inside is physically stuck. This usually happens when a fibrous scrap — celery strings, onion skin, corn husk — wraps around the grinding plate, or when a hard object like a fruit pit or a piece of cutlery drops in and jams the mechanism. Turn the unit off at the wall switch first, then use a flashlight to look down into the drain opening; never put your hand inside. Many garburators come with a small hex wrench that fits into a hole underneath the unit, letting you manually rotate the flywheel back and forth to free whatever's stuck. If yours doesn't have that, a wooden spoon handle pressed against one of the grinding plate's blades from above can sometimes do the same thing. Once it turns freely by hand, restore power and try the reset button before running it again.
What does the reset button on a garburator actually do?
The reset button is a small red or black button on the underside of the unit, and it's the equivalent of a built-in circuit breaker for the motor. When the motor overheats — usually because it was jammed and straining against something for too long — it trips automatically to protect itself from burning out. Once the jam is cleared and the unit has had a few minutes to cool down, pressing that button restores power. If it trips again right away, there's likely still something caught inside, or the motor itself may be failing.
Why does my garburator leak underneath the sink?
A leak usually shows up in one of three places: the sink flange where the unit connects to the drain opening, the side where it connects to the dishwasher hose, or the bottom of the unit itself. A leak at the flange or dishwasher connection is often just a loose fitting or worn seal, which is a straightforward repair. A leak from the housing of the unit — water seeping out of the metal body itself — usually means an internal seal has failed, and at that point replacement is typically more practical than repair. Since a garburator sits directly below a cabinet full of cleaning supplies and connects to both the sink drain and the dishwasher line, even a slow leak is worth addressing quickly in an older Toronto home where the cabinet floor may already be showing some wear.
Why does my garburator smell bad even when it's working fine?
Odour is almost always trapped food residue on the underside of the splash guard or caught in the grinding chamber, not a sign the unit is broken. Running cold water with a few ice cubes and a handful of coarse salt helps scrub the inside walls, and grinding half a lemon or lime afterward freshens things up. Avoid pouring bleach or strong chemical cleaners down a garburator regularly, since they can degrade the rubber splash guard and the seals over time.
What should never go down a garburator?
Grease and cooking oil should never go down any drain, garburator or not, since they harden in the pipe well past the unit itself. Fibrous items like celery, corn husks, and onion skins are the most common cause of jams. Coffee grounds, eggshells, and pasta or rice don't grind cleanly and tend to accumulate downstream. And anything hard — bones, fruit pits, glass, cutlery — can damage the grinding plate outright. When in doubt, the garbage or green bin is the safer choice.
When is it worth calling a plumber about a garburator?
Call a plumber if the unit won't reset after you've cleared a visible jam, if the leak is coming from the housing rather than a connection, if the motor runs but makes a grinding or metallic noise with nothing caught inside, or if the unit is more than eight to ten years old and problems are becoming frequent. A plumber can also confirm whether a leak has affected the connections to your dishwasher or sink drain, which matters in older GTA homes where under-sink plumbing has often been modified more than once over the years.
Frequently asked questions
Is it normal for a garburator to hum occasionally without a jam? A brief hum right when you flip the switch is normal as the motor starts up, but a sustained hum with no grinding sound almost always means something is physically blocking the flywheel.
Can I use drain cleaner to fix a smelly or slow garburator? It's best avoided — chemical drain cleaners can damage the rubber splash guard and internal seals, and they don't address the food residue that's actually causing the smell.
How long does a typical garburator last? Most units last somewhere in the range of eight to twelve years depending on use, though that varies a lot with how well it's cared for and what tends to go down it.
A garburator that hums instead of grinds usually just needs the jam cleared, not a replacement — request a plumber or message us on Facebook. Free for homeowners, care of GetFixHero.
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