The short answer
When the DIN line finishes a cycle with water still in the sump, the machine has usually tried to drain and been stopped. The question is where — at the filter, at the impeller, or somewhere along the hose between the machine and the waste. Each is ruled out in minutes, and the order matters because the first two are free. The name covers a small group of numbers that share their construction, which is what fixes the order of the checks below.
What you observe on these models
- Drain works after the filter is cleaned, then fails again in a week — The filter is catching what a partly blocked sump is failing to pass; cleaning treats the symptom each time.
- Cycle stops early and the panel will not clear — Many machines abandon the cycle when the water has not gone, so a drain fault presents as a stalled cycle rather than as standing water.
- Water standing in the sump at the end of every cycle — An inch or so left over the filter, usually cloudy, with dishes that came out mostly clean.
- The machine hums but the water level does not move — The pump is being commanded and is drawing current, so the fault is mechanical rather than electrical.
- NEAR MISS — the tub is empty but dishes are wet — That is a drying complaint, not a drainage one, and it belongs on a different page.
Causes, most likely first on the DIN line
- Blocked filter and sump screen — Most likely here. A fouled filter restricts flow before it blocks it outright, which is why drainage gets gradually slower and then stops altogether.
- Drain pump impeller jammed — Second on this family. It ranks high because the fix is usually removal of an object rather than a part, and the check is behind one screw-in filter.
- Blocked air gap or a capped disposer inlet — Third, and less common. An air gap at the sink collects the same debris the filter does, and cleaning one takes a cloth and no tools.
Check in this order, and why
- Take the filter out and look at the sump under it — Twist it free, rinse it, and put a hand into the well beneath — most of what blocks a drain is sitting there and comes out with a finger.
- Reach the impeller through the sump opening — With the power off, turn the impeller by hand. It should spin freely. A hard stop is an object, and the object is usually visible once the light is right.
- Open the air gap at the sink, or check the disposer inlet — Lift the cover and clear the chamber. If a disposer was fitted recently, confirm the knockout plug in its inlet was actually removed.
Before you open anything
Safety
Kill the power at the breaker first: a capacitor can hold a charge after the power is off. Treat standing water as if it holds glass, scoop it out rather than feeling through it, and leave the door interlock alone — it is what keeps scalding water inside the cabinet.
Models in the DIN family
Reference| Model number | Family key |
|---|---|
| DIN25400 | beko:dishwasher:din |
| DIN25401 | beko:dishwasher:din |
When to call a technician
Everything above the sump floor is owner work: filter, impeller by hand, hose route, air gap. The call starts where a part has to be replaced or the machine has to come out of the cabinet to reach the pump body. Call sooner if the machine has been left full of standing water for more than a day or two, because the smell and the biofilm become their own job.
Other problems covered for this family
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