Water pooling at the bottom of the tub at the end of a cycle is one of the most common signs of a drainage problem. According to our service data, it’s also the single most frequently reported dishwasher issue. Here’s how to find the cause.
The most common causes
- The drain pump : nearly 2 breakdowns out of 3. By far the leading cause: wear, a blockage from an object, or a pump that has simply burned out.
- The drain hose : more than 1 breakdown out of 4. A kinked hose, one clogged with debris, or poorly positioned prevents water from draining properly. Our installation guide specifies the height to maintain relative to the drain.
- The filter : about 1 breakdown out of 20, but it’s the best news of the bunch: it’s by far the easiest cause to fix yourself, with a very high resolution rate on the first check. Here’s how to clean it.
- The motor and control board: rarer, but possible, especially on older appliances.
What you can check yourself (do this first)
- Remove and clean the filter, it’s the most worthwhile step. Our detailed guide also explains why inspecting it regularly prevents a lot of headaches.
- Check that no debris (bone, shell, label, broken piece of dishware) is blocking the bottom of the tub.
- Check that the drain hose isn’t kinked or pinched behind the appliance, and that it meets the recommended height. See our installation guide.
- If your dishwasher shares its drain with the sink’s garburator, make sure that isn’t itself blocked. Grease and food residue are among the leading causes of clogged pipes in a kitchen.
- Run a drain-only cycle (without a full wash) to see if the problem persists on its own.
When to call a repair technician
- The filter is clean, the hose is clear, but water still pools: the drain pump is probably the culprit, and replacing it requires disassembling the appliance.
- You hear a humming sound but no water drains: that’s a sign of a mechanical blockage (a stuck object, a seized bearing, or a jammed impeller) preventing the pump from turning.
- A stagnant water smell persists despite cleaning, see our dedicated article if you haven’t already.
- The problem keeps coming back despite minor repairs: at this point, it’s worth weighing the repair cost against replacement, especially on an older appliance. Our guide to choosing a new dishwasher can help guide that decision.
Filter clean and water still pooling? Our technicians, trained on all brands, serve Laval, Montreal and the greater Quebec City region, with a one-year warranty on every repair performed. They can also help you assess whether the repair is worth it. Submit a service request.
Appelez au 514 800-4064
FAQ
Can a dishwasher that won’t drain be dangerous?
Not directly, but standing water encourages bad odours and bacterial growth, and starting a new cycle on a tub that’s already full can cause it to overflow.
Should I drain the standing water before the technician arrives?
It’s not necessary, but if you do, use a sponge or a small container rather than running another cycle, which could make an overflow worse.
In Summary
Almost 9 out of 10 drainage failures come down to the pump or the drain hose. The filter, meanwhile, accounts for only a small fraction of cases, but it’s exactly the one to check first, since it’s resolved on the first try almost every time. If the problem persists after that, it’s time for a technician.
