The short answer: standing water at the end of a cycle means the wash water is not being pumped out, and the block is usually the filter or debris in the sump, which you can clear yourself. Lift out the filter, clean the sump, and check the drain hose for a kink. If the water still will not clear, or the machine is showing F11, the fault has moved to the non-return valve, the drain pump, or the connection under the sink, and that is a technician visit.
What Is Happening at the End of the Cycle
A Miele dishwasher ends each program by running the drain pump to push the used water through the sump, out the drain hose, and into the disposal or drain line under the sink. If anything along that path is restricted, the pump cannot clear the water in time and it settles back into the bottom of the tub. That is why draining problems almost always show up as a pool of water sitting in the base after the cycle finishes, sometimes with a gurgling sound as the pump struggles.
Miele also builds in the Waterproof System, which uses a float in the base tray to shut things down if it detects a leak. A drainage problem itself does not usually trip that float, but if a clog forces water where it should not go and it reaches the base tray, the float can add a stop on top of the drain issue. Sorting the drain path from a leak is part of the diagnosis.
Common Symptoms and What They Point To
| Symptom | Likely Cause | Owner or Tech |
|---|---|---|
| Shallow water over the filter after every cycle | Clogged coarse or fine filter, debris in the sump | Owner can clean first |
| Water will not clear plus an F11 code | Drain fault: filter, non-return valve, or pump blocked | Owner cleans filter, then tech |
| Gurgling but water stays in the tub | Blocked or kinked drain hose, or clogged non-return valve | Owner checks hose, then tech |
| Full pool of water, pump silent | Failed drain pump or jammed impeller | Technician |
| New install or after disposal work, will not drain | Blocked air gap, capped disposal port, or high drain loop issue | Technician |
Because so many of these point back to a single fault, a Miele that will not drain very often shows the F11 drain code at the same time. The code and the standing water are two views of the same problem, and the diagnostic order is the same either way.
Start with the Filter and Sump
The filter is the first and easiest suspect. Twist out the cylindrical filter in the base of the tub, rinse it under the tap, and clear any food debris and the coarse strainer sitting beneath it in the sump. Wipe the sump area so nothing can get drawn back into the pump. Run a rinse cycle. A clogged filter is the single most common reason a Miele stops draining, and this step alone resolves a large share of calls.
The Drain Hose, Non-Return Valve, and Pump
If the filter is clean and water still sits in the tub, follow the path outward. The drain hose can kink behind the machine or clog with grease. The non-return valve, which keeps drained water from flowing back into the tub, can jam with debris. The drain pump itself can fail or have its impeller jammed by a fragment of glass or a fruit pit. These need the machine pulled and the pump opened, so they are technician work rather than owner fixes.
The Connection Under the Sink
Where the drain hose meets the plumbing, a blocked air gap or a disposal whose knockout plug was never removed will stop the water cold. This shows up most often right after a new install or after garbage disposal work. A drain loop mounted too low can also let water siphon back. These are quick to confirm once a technician traces the line under the sink.
Before cleaning the filter, scoop or sponge out the standing water so you are not working in a full tub. Watch for broken glass or hard debris, which is exactly what jams a drain pump. If you find water underneath the machine or the base feels wet, stop and treat it as a possible leak, since that can trip the Waterproof System float. For more on that, see our page on water leaking.
What a Technician Checks
A Miele drain diagnosis follows the water out of the tub. The technician confirms the filter and sump are clear, then checks the drain hose for kinks and clogs and inspects the non-return valve for debris. The drain pump is tested and the impeller checked for a jam. If the machine is newly installed or was recently worked on, the air gap, the disposal connection, and the drain loop height under the sink are verified. If any water has reached the base tray, the source of that leak is found before the float can reset.
When to Call a Technician
Clean the filter and sump, clear any debris, and check the drain hose for a kink first. Call for service when the water still will not clear, when F11 keeps returning, when the pump is silent or grinding, or when the trouble started right after a new install or disposal work. Call right away if you find water beneath the machine, since a leak can trip the Waterproof System. Every repair we perform in Brookville carries our Written warranty terms for eligible completed repairs. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
Frequently Asked Questions
Why Is There Standing Water in the Bottom of My Miele Dishwasher?
Is a Miele Draining Problem the Same as an F11 Code?
Can I Fix a Miele That Will Not Drain Myself?
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