Miele Washer Error Code F4002

F4002 means the washer's control system has detected that the drum is not yet stationary and is preventing the door from opening as a safety measure. The door interlock remains engaged until the drum comes to a complete stop. In many cases this resolves on its own within a minute or two after the cycle ends. If the door stays locked for an extended period, there may be a sensor or mechanical issue preventing the drum from stopping properly.

You should not force the door open when this error is active. The lock is engaged specifically to prevent injury from a drum that may still be in motion. Forcing the door can damage the door latch mechanism and the interlock assembly, leading to additional repair costs. Wait for the drum to fully stop and the error to clear before attempting to open the door.

Repair costs depend on the cause. If the issue is a faulty rotation sensor or tachometer, parts and labor can range from roughly 100 to 250 dollars. A motor brake replacement may run between 150 and 350 dollars depending on parts availability and local labor rates. Motor control board replacement is typically the most expensive repair, often ranging from 300 to 600 dollars or more. Diagnosis by a qualified technician is the best way to determine the exact repair needed before committing to a cost.

Start by waiting two to three minutes after the cycle completes to allow the drum to fully decelerate and stop. If the door unlocks afterward, no further action is needed. If the error persists and the door remains locked, try performing a power reset by unplugging the machine for a few minutes, then restarting. If the problem continues, inspect the rotation sensor, motor brake, and drive belt for faults.

A power reset can sometimes clear F4002 if the error was triggered by a temporary sensor glitch or a control board communication issue. Unplug the washer for two to three minutes, then restore power and allow the machine to restart. However, if the underlying cause is a faulty tachometer, worn drive belt, or failing motor brake, the error will return and the root cause will need to be addressed.