Miele Washer Error Code F4059

F4059 means the washer's control system has not received the door release signal from the EFU 235 module, specifically signal 1. The EFU 235 is responsible for communicating that the door lock has been safely released after a cycle. When this signal is missing, the machine keeps the door locked and displays the fault code. The cause is typically a failed EFU 235 module, damaged wiring, or a faulty door lock actuator.

No, you should not attempt to run wash cycles while F4059 is active. The door lock circuit is not functioning correctly, and the machine may be unable to reliably secure or release the door. Continuing to operate the washer in this condition could result in water leakage or an inability to open the door mid-cycle. The fault should be diagnosed and repaired before resuming use.

Repair costs vary depending on which component has failed. If only the wiring harness needs attention, costs may be relatively low, primarily covering labor in the range of 80 to 150 dollars. If the EFU 235 module requires replacement, parts and labor combined could range from 200 to 450 dollars depending on your location and service provider. A control board replacement, if needed, would be at the higher end of that range or beyond.

Basic checks such as inspecting the wiring harness connectors around the door lock area for looseness or visible damage are within reach for a knowledgeable DIYer. However, testing the EFU 235 module and diagnosing the signal circuit accurately requires a multimeter and familiarity with Miele's wiring layout. If the module itself has failed, replacement is the solution and professional service is recommended to ensure correct installation.

A power reset may temporarily clear the error display, but the fault will return as soon as the machine attempts to complete a cycle and the EFU 235 module fails to send the release signal again. The underlying component failure must be identified and corrected for the code to be permanently resolved. Resetting alone is not a fix.