Miele Washer Error Code F4001

F4001 indicates that the washer has detected water in the suds container at or above 30 mm water column. As a safety measure, the machine engages the door interlock to prevent opening while this water level is present. The fault points to a drainage issue that must be resolved before normal operation can resume.

No, you should not attempt to run a wash cycle while F4001 is active. The door interlock is engaged because water is detected at an unsafe level inside the machine. Running the washer in this state could worsen the underlying drainage problem or cause a water leak.

If the fix is just cleaning a blocked drain filter, the cost can be minimal, essentially free if you do it yourself. Drain pump replacement on a Miele washer typically runs in the range of $150 to $350 including parts and labor, depending on your location and service provider. Pressure sensor replacement tends to fall in a similar range.

In many cases, yes. Start by checking and cleaning the drain pump filter, which is accessible from the front lower panel. Also inspect the drain hose for kinks or blockages. If the filter and hose are clear, the issue may involve the drain pump or pressure sensor, which typically requires a technician for testing and replacement.

A simple reset will not permanently clear F4001 if the underlying drainage problem still exists. The fault will return as soon as the machine detects water at or above the 30 mm wc threshold again. You need to resolve the drainage issue first, after which the error should clear on its own once the water level drops.