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Bosch Washing Machine Error Code F04

Reviewed by the ApplianceErrors Editorial Team · Verified against manufacturer service documentation · Last verified: July 19, 2026
⚠ High Severity 🔧🔧🔧 Advanced DIY

Motor fault — drive motor not running correctly

The most common cause of the F04 error on a Bosch washing machine is carbon brushes worn down (~40% of cases); start with: power cycle the machine.

💰 DIY cost: $10–$200 👨‍🔧 Pro cost: $180–$420 Save $170+ by doing it yourself
Bosch Washing Machine error code F04 on the display panel
How the F04 code appears on a Bosch washing machine display

What Does Error Code F04 Mean on a Bosch Washing Machine?

Motor fault — drive motor not running correctly.

F04 fires when the control board monitors the drive motor and detects it isn't behaving as commanded — failing to start, stalling under load, or turning at the wrong speed based on tachometer feedback. Worn carbon brushes are the most frequent trigger, followed by winding failure, a faulty motor control board, or a loose or corroded motor connector. Unlike F43 or F03, which point to speed-sensing or related drive issues, F04 indicates the motor itself is not running correctly.

Models affected: Bosch front-load washers with brush-type (universal) drive motors, primarily older WFB-range machines
What owners report: Owners commonly report F04 appearing mid-cycle, often during spin when the motor is under the most load, and the drum may fail to turn. It can sometimes be triggered by a loose motor connector rather than a dead motor, so a quick power cycle and reseating the harness is worth trying first; on higher-mileage machines, replacing worn carbon brushes frequently resolves it.

What Causes Error Code F04?

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

  1. 1
    Carbon brushes worn down 40% of cases
  2. 2
    Motor winding failure 25% of cases
  3. 3
    Motor control board fault 25% of cases
  4. 4
    Motor connector loose or corroded 10% of cases

How to Fix Bosch Washing Machine Error Code F04

🔧🔧🔧 Advanced DIY Est. time: 1–3 hours
⚡ Safety first: Unplug the appliance before opening any panels or touching internal components.
  1. 1

    Power cycle the machine

    Unplug 5 minutes and restart; intermittent faults can clear.

  2. 2

    Check the motor connector

    Reseat the motor harness connector.

    ⚠️ Unplug the machine before servicing the motor.
  3. 3

    Inspect/replace the carbon brushes

    Brushes under 10–15 mm typically need replacement on brush-motor models.

    🔩 Bosch washer carbon brushes ($10–$30)
  4. 4

    Test the motor windings

    Check winding resistance with a multimeter.

    🔩 Multimeter

How to Reset Error Code F04

Unplug 5 minutes, restart. If F04 persists, inspect the carbon brushes.

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

Full Bosch washer reset guide → Enter diagnostic mode → Symptom guide: Washer not spinning →

Did this guide fix your appliance?

When to Call a Professional

If brushes and winding test good, replace the motor control board or the drive motor.

Average professional repair cost for this issue: $180–$420

Related Error Codes

F43
Drum not turning — motor jammed, worn brushes, or motor fault
⚠ High Severity
F03
Drain timeout — water did not drain within the expected time
⚠ High Severity

Find Replacement Parts

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

🔩
Search PartSelect
Bosch Washing Machine repair parts
🔧
Search RepairClinic
Step-by-step video guides

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

More Bosch Washing Machine Error Codes

E18 Drain time exceeded — water not draining within expected time E02 Door lock failure — cannot lock door for cycle E17 Water intake fault — fill time exceeded E04 Anti-flood device activated — water detected in base F01 Water intake timeout — machine failed to fill within the expected time F02 Heating timeout — water did not reach the target temperature

Frequently Asked Questions

Can I keep using my Bosch Washing Machine when error F04 appears? +
It is not advisable. The washing machine may still power on, but running it while F04 is active can worsen the motor fault or damage related parts. Treat it as a soon-as-possible repair.
What most commonly causes F04 on a Bosch Washing Machine? +
Across reported Bosch washing machine repairs, the most frequent is carbon brushes worn down (40% of cases), motor winding failure (25%), then motor control board fault (25%). Check them in that order before replacing any parts.
F04 keeps coming back after a reset — what should I check next? +
A reset only clears the stored F04 fault; if it returns, the motor problem is still present. Move on to the physical checks — power cycle the machine, then check the motor connector — since the code will reappear until the root cause is resolved. This is an advanced repair involving deeper disassembly or electrical testing.
How much does it cost to fix Bosch Washing Machine error F04? +
A DIY repair typically runs $10–$200 in parts, versus $180–$420 for a professional service call, so handling it yourself saves around $170. Expect the work to take 1–3 hours.
Which Bosch Washing Machine models show error F04? +
F04 is documented on Bosch front-load washers with brush-type (universal) drive motors, primarily older WFB-range machines. 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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