Miele Dishwasher Not Draining? Causes & Fixes

A Miele dishwasher is known for its quiet performance and spotless results, but even the most reliable appliances can run into problems. One of the most common issues homeowners face is when a Miele dishwasher refuses to drain properly. Standing water at the bottom of the machine is more than an inconvenience — it can lead to unpleasant odors, dirty dishes, and potential damage to the unit if ignored. Understanding the causes and solutions can help you decide whether the problem is a quick fix or a situation that requires professional service.

In many cases, the problem starts with a clogged filter. Food particles and residue can accumulate at the bottom of the dishwasher and block proper drainage. Cleaning the filter regularly helps prevent this buildup and restores normal water flow. If you notice water collecting after a cycle, the filter should be the first thing you inspect.

Another frequent culprit is the drain hose. Kinks or blockages in the hose can prevent water from exiting the machine, leaving it pooled inside. Checking the hose for bends or clogs can sometimes resolve the issue. Similarly, the air gap or garbage disposal connection can become obstructed, leading to drainage problems that seem like a dishwasher malfunction but are actually related to the plumbing.

The drain pump itself may also be to blame. Over time, foreign objects such as broken glass, food particles, or even labels from jars can block the pump impeller, stopping it from working effectively. In this situation, the dishwasher may hum but fail to drain. Repairing or replacing the pump is best left to a certified Miele technician, as it requires specialized knowledge and tools.

Electrical or control board issues are less common but still possible. If the dishwasher runs a full cycle yet leaves standing water without any mechanical blockages, the problem may be related to sensors or electronic components not signaling the drain function correctly. These cases almost always require professional diagnostics.

Routine maintenance is the best way to avoid drainage problems. Cleaning the filter, inspecting the drain hose, and ensuring the spray arms are free of debris will help the dishwasher run efficiently. However, if you’ve checked these common problem areas and the issue persists, it’s time to call for expert help.

Miele appliances are sophisticated systems, and attempting complex repairs without training can create bigger problems. Certified Miele service technicians can quickly identify the root cause, repair or replace faulty parts, and return your dishwasher to peak performance.