DIY with Ka Pai: Troubleshoot your waste disposal
If your waste disposal’s not working, you’re not alone - it’s one of the most common kitchen calls we get across Wellington homes. But here’s the secret, often it’s a really easy fix. Whether your Insinkerator’s not working, it’s just humming, or nothing happens when you flick the switch, don’t stress. Before calling us out, here are a few simple checks that might save you the hassle.
Step 1: Check the Power
Let’s start with the basics.
Make sure the unit is plugged in firmly under the sink.
Check your fuse box for a tripped circuit breaker.
Some units have a reset button on the base Press it once and wait a few moments. It’s a small red button right under the unit (you’ll need to bend right down and get your head under the unit to see it).
If it hums but doesn’t spin, skip ahead - that means it’s getting power, but the blades are stuck.
Step 2: Free the Jam (Safely!)
A humming Insinkerator usually means something’s jammed inside. Never stick your hand down there. Instead:
Turn the power off at the wall.
Use the allen key (often supplied with the unit and the installer usually leaves it in a box under the kitchen sink) in the slot underneath.
Wiggle it until it moves freely.
Restore power and test again.
Still stuck? You might have something tougher lodged in there - like a bone or utensil - and it’s time to call in the pros.
Step 3: Check for Leaks or Blockages
If the disposal runs but doesn’t drain properly, the problem might be:
A blocked waste pipe under the sink.
Too much food waste or grease build-up.
Or a loose trap that needs tightening.
At Ka Pai Plumbing, we’ve seen it all - from clogged coffee grounds to whole spoons rattling around down there. If water’s backing up or leaking, turn off the unit and contact us before it causes bigger issues.
Give us a ring on 04 890 5707 or instantly book one of our team https://www.kapaiplumbing.co.nz/book-a-service.
Maybe it’s time to replace your insinkerator
Waste disposals typically last 8-10 years. If yours keeps tripping, leaking, or making odd noises even after a reset, it might be time for a replacement. We can help you choose and install a new model that suits your kitchen setup. Often these are in stock so it can be a same day replacement.
People Also Ask
Why is my waste disposal not working but humming?
That humming sound means it’s jammed. Turn off the power and try freeing the jam with the Allen key underneath.
What should I not put in my Insinkerator?
Avoid fibrous foods (like celery), fats, oils, and large bones - they cause clogs or jams.
Can I use drain cleaner in my waste disposal?
We suggest no. Chemical cleaners can damage seals and pipes. Stick to warm water, baking soda, and vinegar.
Why does my disposal smell?
It’s processed hundreds of kilos of food waste - so sometimes they get a bit smelly. Run some slices of lemon through it to clean the blades and freshen things up.
When to Call Ka Pai Plumbing
If you’ve tried the steps above and your Insinkerator’s still not working give us a call.
We’ll diagnose the issue, fix it properly, and make sure your kitchen’s back to normal - no mess, no stress.
Call 04 890 5707 or instantly book a plumber online with a reliable Porirua plumber to help you with your waste disposal repair.