The short answer
On the Big Chill DWT dishwasher water left standing at the end of a cycle is usually a drain step that is not happening rather than a drain path that is blocked. The DWT table lists one model, so the sequence below holds across the whole model list.
What you observe
- Standing water in the base at the end of every cycle — A small film in the sump is normal on most builds; water above the filter after the cycle ends is not, and the amount left tells you whether it is a restriction or a stop.
- The pump runs and the water does not go — You can hear the drain pump working.
- No drain sound at all at the end of the cycle — Either the pump is jammed, or the cycle never reached the drain step.
- NEAR MISS — water on the floor rather than in the tub — That is a leak, not a drainage fault, and the leak page will get you there faster.
Causes, most likely first on the DWT family
- The drain pump jammed, seized or not being called — First on this family — the DWT table lists one model — and a jammed impeller is both the commonest hard stop and the easiest to confirm: the cycle reaches the drain step, the pump hums or stays silent, and the water does not move at all rather than moving slowly.
- The cycle being interrupted before it drains — Second and frequently overlooked: a door opened near the end, a power interruption, or a cycle cancelled mid-wash leaves the tub full with nothing wrong. Running a drain or rinse cycle settles it immediately.
- Filter, sump and impeller debris — Third: the slow-decline version of the same fault, where the machine moves some water but never clears the sump. It is the most common cause across this class as a whole.
- Hose routing and the sink waste — Last on this ranking — a hose or trap fault usually produces a slow drain or a refilling tub rather than the dead stop that puts the pump at the top of this list.
Check in this order, and why
- Run a drain or rinse cycle and listen at the base — First: hearing whether the pump is called at all splits this list in half in under a minute.
- Cancel, bail the tub and clear the filter and pump inlet — Second, with power off — a jam is visible, and clearing it is often the entire repair.
- Check the hose for kinks and the loop — Third, because a pump that runs freely and still moves nothing is looking at a blocked path rather than a broken part.
- Fill and drain the sink to test the shared waste — Last of the owner checks: if the sink is slow, the machine was never the problem.
Before you open anything
Safety
Unplug the appliance or switch off its breaker before removing any panel or reaching into the sump — a capacitor can hold a charge after the power is off, and broken glass is the usual find down there. Wear a glove and use a torch rather than feeling blindly. Shut the water supply before disturbing a hose.
Models in the DWT family
Reference| Model number | Family key |
|---|---|
| DWT 81900 SS | big-chill:dishwasher:dwt |
When to call a technician
Call when the filter, sump and hose are clear, the sink drains freely, and the pump still will not move water — that is a pump replacement and it needs the machine out. Call sooner if the waste connection itself is blocked behind the cabinet or shared with plumbing you cannot isolate.
Other faults covered for the DWT family
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Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
