The drain service of Pure Mechanical GroupMetro Vancouver + Fraser Valley
Drain problems · Kitchen

Garburator humming but not draining

A hum means the motor has power and cannot turn. Silence means it has tripped. Running freely with water still in the sink means the unit is fine and the pipe past it is blocked. Each one has a different fix.

Cutaway drawing of a garburator under a sink with a blockage in the outlet pipe
Jammed in the chamber or blocked past it

What it usually means

It hums and does not turnSomething is wedged between the grinding plate and the ring: a bone, a fruit pit, a bottle cap, a piece of cutlery.
It does nothing at allThe overload has tripped. There is a red reset button on the underside of the unit.
It runs, and water stays in the sinkThe garburator is working. The trap or the line past it is blocked with ground-up food and grease.
Water comes up in the other bowlSame thing. The blockage is past the point where the two bowls join.
It leaks from the bottomThe internal seal has gone. That is a replacement, not a repair.

How to free a jam safely

  1. Switch it off at the wall and unplug it under the sink. Never put a hand in the chamber.
  2. Find the hex socket in the centre of the underside. Fit the small Allen key that came with the unit, or a 1/4-inch hex key, and work it back and forth until it turns freely.
  3. Look in with a flashlight and lift out whatever was jamming it with tongs or pliers.
  4. Press the red reset button on the bottom, plug it back in, run cold water and switch it on.
  5. If it runs and the sink still will not drain, the problem is the pipe. See kitchen sink will not drain.

Stop and call a plumber if

  • It trips the reset again as soon as it starts
  • Water is dripping from the body of the unit
  • It runs but the sink will not empty
  • You have poured drain cleaner into it. Tell us when you book

Call 1-800-604-0631, any hour.

What fixing it costs

Clearing a blocked garburator line is a flat price: from $299. What a garburator clog costs and why. Those are regular-hours prices (9 to 5, Monday to Friday). Outside those hours every price is double. Each covers up to 2 hours on site, and the drain is tested in front of you before we leave.

If the unit itself has failed, see garburator installation. Most residential units last eight to fifteen years depending on use.

Questions people ask

What should never go in a garburator?

Grease and oil, coffee grounds, eggshells, rice and pasta, potato peels, fibrous vegetables like celery, and bones. Most of what blocks the pipe went through the garburator first.

Should I run hot or cold water?

Cold. It keeps fat solid so it is chopped and carried away. Hot water melts it and it sets again further down the pipe.

Is it worth repairing an old one?

Rarely. Once the seal leaks or the motor is failing, a new unit costs less than the labour to rebuild the old one.

Rather have a plumber look?