mypros+
Error code reference

Miele Washer Error Code F4107

Checksum fault for monitoring block allocation list in control.

Miele codesMiele washer codes

Checksum fault for monitoring block allocation list in control.

MyPros+ Max

Get the full diagnostic procedure for F4107.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What F4107 means on a Miele washer

F4107 is a checksum fault related to the monitoring block allocation list stored within the washer's main control unit. A checksum is a calculated value used to verify the integrity of stored data. When the control unit reads the block allocation list, it computes a checksum and compares it to an expected value. If the two values do not match, the control determines that the stored data has been corrupted or altered, and it triggers the F4107 fault code to prevent the machine from operating on unreliable configuration data.

The monitoring block allocation list is an internal data structure the control uses to manage and track operational parameters, memory sectors, and functional monitoring zones within the control electronics. Corruption in this list can result from power surges, incomplete firmware updates, capacitor degradation within the control board, or memory cell failures in the onboard non-volatile storage such as EEPROM. In some cases, a single unexpected power interruption during a write cycle can corrupt the checksum record permanently.

Because the fault originates within the control unit's internal memory and verification logic, it typically cannot be resolved through simple user-level resets. The control board itself is the primary suspect. Technicians should first attempt a full power cycle by disconnecting the washer from mains power for several minutes. If the fault persists on restart, the control unit will likely require reprogramming or replacement, as the corrupted data integrity cannot be restored through normal diagnostic procedures.

Source: manufacturer service documentation.

Common causes of F4107

  1. 01

    Control board EEPROM or memory corruption

    Part replacement

    Non-volatile memory on the control board can degrade or suffer data corruption over time, especially after power interruptions during write cycles. This causes the stored checksum to no longer match the block allocation data.

  2. 02

    Power surge or voltage spike

    Part replacement

    A sudden surge in mains voltage can corrupt data stored in the control unit's memory registers. If the error appeared after a power event such as a storm or grid fluctuation, this is a likely cause.

  3. 03

    Incomplete or failed firmware update

    Wiring / connection

    If a firmware or software update to the control unit was interrupted or failed partway through, the block allocation list may have been written incorrectly, producing a checksum mismatch on subsequent verification.

  4. 04

    Faulty or failing control board

    Part replacement

    Component degradation on the control board, including capacitor failure, can cause the processor to read or write data incorrectly. If no external cause is identified, the control board itself may have reached end of serviceable life.

  5. 05

    Intermittent power supply to the control unit

    Wiring / connection

    Unstable voltage delivery from the internal power supply board to the control unit can cause unreliable memory operations. Check wiring connections and the power supply board output before condemning the control unit.

See the test procedure for each cause

Frequently asked questions about F4107

What does F4107 mean on a Miele washer?
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.
Can I fix F4107 on my Miele washer myself?
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.
Is it safe to use my Miele washer when F4107 is displayed?
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.
How much does it cost to repair a Miele washer with error code F4107?
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.
Will resetting the washer clear the F4107 error code?
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.

Related Miele washer codes

All Miele washer codes
View all 254 Miele washer codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass