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Miele Washing Machine Error Code F43

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: July 19, 2026
⚠ High Severity 👨‍🔧 Call a Pro

Appliance model not programmed

The most common cause of the F43 error on a Miele washing machine is replacement board not coded to model (~60% of cases); start with: confirm recent board work.

💰 DIY cost: $0–$0 👨‍🔧 Pro cost: $200–$450 Save $200+ by doing it yourself
Miele Washing Machine error code F43 on the display panel
How the F43 code appears on a Miele washing machine display

What Does Error Code F43 Mean on a Miele Washing Machine?

Appliance model not programmed.

F43 fires when the control electronics contain no valid model identification code, so the board cannot determine cycle parameters, drum size, heater rating, or other configuration data specific to that washer. It differs from general control faults like F39 or F41 because the hardware may be sound — the electronics simply lack the model programming. This most often follows a control-board replacement where the coding step was skipped, or a memory fault that erased the stored model data.

Models affected: Miele W1 Series front-load washers, and other electronically coded Miele washers where the control unit stores a model-specific configuration code
What owners report: Owners commonly report this code appearing immediately after a control board has been replaced, when the machine will not start any program. A common false assumption is a failed board, when in reality it only needs to be coded to the exact model using Miele service tooling — which resolves it quickly.

What Causes Error Code F43?

Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:

  1. 1
    Replacement board not coded to model 60% of cases
  2. 2
    Model data lost from memory 30% of cases
  3. 3
    Programming interrupted 10% of cases

How to Fix Miele Washing Machine Error Code F43

👨‍🔧 Call a Pro Est. time: 1–3 hours
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Confirm recent board work

    F43 almost always follows a control-board swap that skipped the model coding step.

  2. 2

    Program the control

    The electronic unit must be coded to the exact model by Miele service tooling.

How to Reset Error Code F43

F43 is not user-resettable — the control must be programmed to the model by Miele service.

Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.

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When to Call a Professional

Model coding requires Miele service tooling — always authorized service.

Average professional repair cost for this issue: $200–$450

Related Error Codes

F39
Electronic unit fault — main control failure
⚠ High Severity
F41
Faulty electronic memory — incorrect data
⚠ High Severity
F45
Defective Flash RAM — incorrect data supplied
⚠ High Severity

Same Code on Other Brands

Error code F43 appears on these other brands too. See every brand that shows F43 →

Bosch logo
Bosch Washing Machine F43
Drum not turning — motor jammed, worn brushes, or motor fault

Find Replacement Parts

Use these links to find the exact replacement parts for your Miele Washing Machine:

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Search PartSelect
Miele Washing Machine repair parts
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Search RepairClinic
Step-by-step video guides

External links — ApplianceErrors.com is not affiliated with these retailers.

More Miele Washing Machine Error Codes

F11 Pump fault — water not draining F19 Drain time exceeded — slow or failed drain F16 Water protection system activated — flood protection triggered F53 Motor fault — drive motor failure F31 NTC temperature sensor fault F1 NTC temperature sensor short-circuited

Frequently Asked Questions

Can I keep using my Miele Washing Machine when error F43 appears? +
It is not advisable. The washing machine may still power on, but running it while F43 is active can worsen the control fault or damage related parts. Treat it as a soon-as-possible repair.
What most commonly causes F43 on a Miele Washing Machine? +
Across reported Miele washing machine repairs, the most frequent is replacement board not coded to model (60% of cases), model data lost from memory (30%), then programming interrupted (10%). Check them in that order before replacing any parts.
F43 keeps coming back after a reset — what should I check next? +
A reset only clears the stored F43 fault; if it returns, the control problem is still present. Move on to the physical checks — confirm recent board work, then program the control — since the code will reappear until the root cause is resolved. This is a repair most owners hand to a technician.
How much does it cost to fix Miele Washing Machine error F43? +
A DIY repair typically runs $0–$0 in parts, versus $200–$450 for a professional service call, so handling it yourself saves around $200. Expect the work to take a full service visit.
Which Miele Washing Machine models show error F43? +
F43 is documented on Miele W1 Series front-load washers, and other electronically coded Miele washers where the control unit stores a model-specific configuration code. Other units sharing the same control platform can display it too, so the fixes here generally transfer across the series.

Sources & References

Content verified against manufacturer service documentation. Last verified: July 19, 2026.

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