Bosch Washing Machine Error F43

⚡ Quick Answer: The Bosch washing machine error F43 indicates a motor drive unit malfunction, often resulting in the drum failing to turn or rotating with difficulty.... ⚠️ Difficulty Varies

What Does Error F43 Mean?

The Bosch washing machine error F43 indicates a motor drive unit malfunction, often resulting in the drum failing to turn or rotating with difficulty. This issue may be accompanied by unusual noises, and the washing machine may stop mid-cycle. Common causes include motor rotation failure, blocked drum, worn motor components like carbon brushes, or electrical connection issues. To troubleshoot, check for overloads or foreign objects obstructing the drum. If problems persist, professional inspection and repair of motor or electronic components may be necessary.

Common Symptoms:

  • Drum does not turn or turns with difficulty or loud noise during cycle
  • Washing machine may stop mid‑cycle with F43 displayed
  • Machine may struggle, jump, or make unusual sounds when attempting to spin

Possible Causes

  • Motor rotation failure or blocked drum (medium)
  • Motor component wear (carbon brushes) or electrical connection issue (medium)
  • Overloaded load preventing drum rotation (medium)

How to Fix Error F43

DIY Fix Check for overload and foreign obstruction

  1. Turn off and unplug the washing machine.
  2. Open the drum and remove some laundry to reduce load.
  3. Try rotating the drum by hand to check for smooth movement.
  4. Listen for unusual noises that may indicate trapped objects.

Technician Only Inspect and repair motor and drive components

  1. Disconnect power and remove back panel to access motor and drive system.
  2. Check and replace worn carbon brushes on the motor if necessary.
  3. Inspect motor wiring and connections for damage or loose contacts.
  4. Test the motor and tachogenerator (speed sensor) for proper operation.
  5. Replace faulty motor or electronic control board as needed.

Parts needed: Motor carbon brushes, Motor assembly, Motor wiring harness, Tachogenerator, Control board (if diagnosed)

🛑 When to Call a Pro:
  • If the drum still will not turn after reducing load or removing obstructions
  • If you detect burning smells, sparks, or severe noise from the motor area
  • If internal component inspection indicates motor or electronic faults beyond basic cleaning

Technical Specifications

wattage 500W
component Motor Drive Unit
resistance 1-5 ohms
part_number Bosch 00167777
voltage_rating 120V AC

Common Questions

What does F43 error mean on bosch washing machine?

F43 indicates a malfunction in the motor drive, resulting in the drum not turning or unusual noises.

Can I fix bosch washing machine F43 error myself?

Yes, you can check for overloads and obstructions in the drum as a first step.

How much does it cost to fix F43 error?

Repair costs vary; motor brushes are low cost, while motor or control board replacements can be more expensive.

When should I call a technician for F43?

Call a technician if the drum won't turn after checking for obstructions or if you notice burning smells or severe noises.

Sources & References

Data last verified: 2026-01-16

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