The short answer
Standing water in the tub at the end of a cycle is a blockage far more often than a failed pump. On an imported mass-market cabinet the ranking below starts at the filter and the drain hose because that is where the obstruction usually is and because both are owner-clearable.
What you observe
- A smell from the tub between uses — Standing water and trapped soil, which is the same fault seen a few days later.
- Water standing in the bottom of the tub after the cycle — The core symptom, and it means the water never left.
- NEAR MISS: a small amount of clean water in the sump between cycles — Many machines keep a little water in the sump by design to stop the seals drying out.
Causes, most likely first on this appliance
- The filter and sump are blocked — Soil, labels, seeds and broken glass collect in the sump and block the drain path. Ranked first on Dechef: the water path on this platform is short and unforgiving of installation shortcuts, and most of these machines were installed quickly, and with the manual as the only reference an owner gets, the checks that need no documentation are the ones worth doing first.
- The waste disposer connection still has its plug — A new disposer ships with a knockout plug in the dishwasher inlet. Ranked second: it ranks here because on this platform it is the second thing to go, not the first.
- A kinked or blocked drain hose — The hose behind or under the machine gets crushed when the machine is pushed back, and it collects grease over time. Ranked third: it sits here because it mimics the cause above it closely enough that checking in the wrong order wastes a visit.
- The drain pump itself — An impeller jammed by glass or a label, or a pump that has failed. Ranked last: it is last because it is genuinely uncommon on this platform, and because it is the one cause an owner cannot confirm or fix without licensed tools.
Check in this order, and why
- Take the filter out and look into the sump — A soil mat on the filter, or debris sitting in the sump well, explains a slow or failed drain immediately.
- Ask whether a disposer or waste connection was fitted recently — A drain fault that started the day the plumbing changed has a plumbing cause.
- Look at the hose run from the machine to the waste connection — A visible kink where the machine was pushed back is a free fix, and a hose that is soft and heavy with grease is a clean-out.
What an owner can safely check
- Remove the filter, clear the sump by hand and rinse both — Bail the standing water out first, then lift the filter, clear the sump with a cloth, rinse the filter under a tap and refit it until it locks.
Tools: cloth, cup or jug, soft brushAbout 30 min
- Check the disposer inlet for the knockout plug and clear the disposer — Switch the disposer off at the wall, check the dishwasher inlet is open and run the disposer to clear standing food.
Tools: torchAbout 20 min
- STOP HERE if the next step needs a meter on live terminals or a panel off — That is where an owner check ends and a service call begins.
Before you open anything
Safety
Switch the machine off at its breaker before reaching into the sump or moving the machine, and switch a waste disposer off at the wall before putting a hand anywhere near it. Expect broken glass in the sump and use a cloth rather than bare fingers. Water left in the tub after a cycle can still be hot enough to scald, so let it stand before bailing it.
When to call a technician
Call once the filter, the sump, the hose, the air gap and the waste connection are all proven clear and water still stands in the tub, because what is left is the pump or the control. Call a plumber rather than an appliance technician if the sink waste itself is slow, because the machine cannot drain into a blocked waste.
Nearest pages of this class
What this page does not cover
This page covers the Dechef dishwasher as a class, not one model or production run. Any family- or model-specific page for your unit takes precedence over it. Not here: the pump and filter part numbers, and the drain routing specified for your specific installation.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
