Miele Washer Error Code F4107

F4107 indicates a checksum fault for the monitoring block allocation list stored in the washer's control unit. The control has compared its stored data against an expected checksum value and found a mismatch, which signals data corruption in the control's internal memory. This is an electronics-level fault within the control board itself and is not related to water, drum, or sensor components.

The washer will typically halt operation when F4107 is active because it cannot verify the integrity of its own control data. Running the machine in this state is not recommended, as the control unit may not reliably manage wash cycles, water fill, or spin functions. Leave the machine off until the fault has been diagnosed and resolved.

A power cycle reset may temporarily clear the fault in some cases, but if the underlying memory corruption is present, the error will return on the next startup when the control re-runs its checksum verification. A persistent F4107 code after a reset indicates that the control board requires professional service, including potential reprogramming or replacement of the unit.

User-level repairs are very limited for this fault. You can attempt a full power cycle by unplugging the machine for 5 to 10 minutes and restarting it to see if the error clears. If the fault returns, the issue is persistent memory corruption inside the control unit, and the repair will require a qualified technician to reprogram or replace the control board.

Repair costs depend on whether the control board needs reprogramming or full replacement. Technician labor alone for diagnosis and a control board replacement on a Miele washer typically ranges from $200 to $600 or more, depending on the specific model and part availability. Miele control boards are precision components and tend to be priced higher than those for many other brands.