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
- Turn off the washing machine and disconnect from power.
- Wait at least 5 minutes and reconnect power.
- Attempt a reset by turning the program dial to 'Off', then follow manufacturer reset steps if available.
Technician Only Inspect and service motor components
- Disconnect power and remove access panels.
- Inspect motor carbon brushes for wear and replace if necessary.
- Check motor tachogenerator for correct operation and replace if faulty.
- Inspect motor wiring and connectors; repair or replace damaged cables.
Parts needed: Motor carbon brushes, Motor tachogenerator, Electrical connectors / wires
- 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.
Next step
Choose the next step for F21
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
- Typical part-only price
- $20 - $120
- DIY difficulty
- Medium
- Estimated time
- 30-90 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Model-compatible Washing Machine parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Washing Machine Cleaner Tablets
Routine tub-cleaning supplies for residue and odor control. They do not repair a mechanical, drainage, or electronic fault.
Braided Washer Inlet Hoses
A maintenance replacement option for visibly worn external fill hoses. Verify thread size, length, and hot/cold connection requirements.
Washer Drain Hose Holder
Helps secure an external drain hose at the standpipe. It does not correct an internal pump or control fault.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
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: 2026-07-22
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