Miele Dishwasher Not Draining: Complete Troubleshooting Guide

Initial Checks

Before assuming a major problem, verify that the dishwasher cycle actually completed. Miele dishwashers hold water in the base until the cycle finishes. An interrupted cycle may leave water standing.

Check that the door latched properly. Miele dishwashers will not drain if the door sensor detects an open condition, even if the door appears closed.

Filter Inspection

Miele dishwashers use a multi-stage filter system at the bottom of the tub. Remove and clean all filter components. Food debris, glass fragments, or label adhesive can block proper drainage.

Clean filters under running water, using a soft brush for stubborn residue. In Arizona, hard water deposits can accumulate on filters, reducing flow.

Drain Hose Issues

The drain hose connects your dishwasher to the sink drain or garbage disposal. Kinks, clogs, or improper installation can prevent drainage.

Verify the hose is not kinked behind the dishwasher. Check that the high loop or air gap installation is correct to prevent backflow.

Garbage Disposal Connection

If your dishwasher drains through a garbage disposal, ensure the knockout plug was removed when the disposal was installed. A new disposal with the plug still in place will prevent dishwasher drainage.

Run the disposal before starting the dishwasher to clear any debris from the drain path.

Drain Pump Problems

If filters are clean and hoses are clear, the drain pump may be failing. You might hear humming without actual drainage, or notice the pump running but water not leaving.

Drain pump replacement requires professional service. The pump is integrated into the dishwasher base and requires proper disassembly to access.

Error Codes

Miele dishwashers display fault codes that help identify drainage issues. F11, F12, and F14 codes relate to water intake and drainage problems. Note any codes displayed and communicate them to your service technician.