Siemens Washing Machine Error F21

⚡ Quick Answer: The Siemens Washing Machine F21 error code indicates a motor or motor control system issue, often resulting in the drum not rotating or the wash cycle... ⚠️ Difficulty Varies

What Does Error F21 Mean?

The Siemens Washing Machine F21 error code indicates a motor or motor control system issue, often resulting in the drum not rotating or the wash cycle stopping unexpectedly. This fault may be caused by worn motor carbon brushes, a faulty tachogenerator, loose wiring, or a mechanical obstruction. Addressing this problem typically requires inspecting motor components to restore proper function.

Common Symptoms:

  • Drum does not rotate or rotates intermittently.
  • Wash cycle stops unexpectedly or won’t start.
  • Error F21 displayed on the control panel.

Possible Causes

  • Worn motor carbon brushes (medium)
  • Faulty motor tachogenerator (speed sensor) (medium)
  • Loose or damaged motor wiring / connections (medium)
  • Motor blocked or mechanical obstruction (medium)

How to Fix Error F21

DIY Fix Basic reset attempt

  1. Turn off the washing machine and disconnect from power.
  2. Wait at least 5 minutes and reconnect power.
  3. Attempt a reset by turning the program dial to 'Off', then follow manufacturer reset steps if available.

Technician Only Inspect and service motor components

  1. Disconnect power and remove access panels.
  2. Inspect motor carbon brushes for wear and replace if necessary.
  3. Check motor tachogenerator for correct operation and replace if faulty.
  4. Inspect motor wiring and connectors; repair or replace damaged cables.

Parts needed: Motor carbon brushes, Motor tachogenerator, Electrical connectors / wires

🛑 When to Call a Pro:
  • If basic reset and visual checks don’t resolve F21 and you are uncomfortable accessing internal motor components.
  • If error persists after replacing wear parts like brushes or if electrical issues are suspected.

Technical Specifications

wattage 30W
component Drain Pump
resistance 10-20 ohms
part_number Siemens 00120345
voltage_rating 230V AC

Common Questions

What does F21 error mean on Siemens Washing Machine?

F21 error indicates a motor or motor control issue, causing the drum not to rotate or the wash cycle to stop unexpectedly.

Can I fix Siemens Washing Machine F21 error myself?

Yes, you can attempt a basic reset and check for visible issues like loose connections or blockages.

How much does it cost to fix F21 error?

The estimated repair cost for the F21 error is moderate, depending on parts and labor rates for motor components.

When should I call a technician for F21?

Call a technician if basic resets don't work, if you're uncomfortable accessing motor components, or if the error persists after replacing parts.

Sources & References

Data last verified: 2026-01-25

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