Bosch Washing Machine Error Code F43
Drum not turning — motor jammed, worn brushes, or motor fault
The drum is not rotating during a cycle. This can result from a physical obstruction, worn carbon brushes preventing the motor from starting, or a motor or motor-control fault.
What Does Error Code F43 Mean on a Bosch Washing Machine?
Drum not turning — motor jammed, worn brushes, or motor fault.
The drum is not rotating during a cycle. This can result from a physical obstruction, worn carbon brushes preventing the motor from starting, or a motor or motor-control fault.
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 Drum jammed by a foreign object (coin, wire, etc.) 35% of cases
- 2 Carbon brushes worn out 30% of cases
- 3 Drive motor seized or winding failure 20% of cases
- 4 Motor control/tacho-generator fault 15% of cases
How to Fix Bosch Washing Machine Error Code F43
- 1
Check for a drum obstruction
Unplug and rotate drum by hand to feel for binding.
⚠️ Unplug before reaching into the machine. - 2
Inspect/replace carbon brushes
Remove and measure brushes; replace if shorter than ~10–15 mm.
🔩 Bosch washer carbon brushes ($10–$30) - 3
Test the motor
Measure winding resistance and tachogenerator output.
🔩 Multimeter - 4
Replace motor if failed
Replace the drive motor if the winding is open or shorted.
🔩 Bosch drive motor ($100–$250)
How to Reset Error Code F43
Unplug 5 minutes and restart; if F43 returns, inspect the carbon brushes.
Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.
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Thanks for letting us know. If the steps above didn't work, see when to call a professional.
When to Call a Professional
If drum, brushes, and motor all check out, the motor control board has failed.
Related Error Codes
Same Code on Other Brands
Error code F43 appears on these other brands too. See every brand that shows F43 →
Find Replacement Parts
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More Bosch Washing Machine Error Codes
Frequently Asked Questions
What does error code F43 mean on a Bosch Washing Machine? +
How do I fix error code F43 on my Bosch Washing Machine? +
How do I clear or reset error code F43? +
Is error code F43 serious? +
Sources & References
- • Bosch Home Appliances Service — official manufacturer documentation
- • Our editorial & verification policy
Content verified against manufacturer service documentation. Last verified: June 10, 2026.