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Bosch Washing Machine Error Codes Explained: Meanings, Causes & Fixes
December 9, 2025
Washer Repair
Bosch Washing Machine Error Codes Explained:
Bosch washing machines use digital error codes to alert users to issues that affect performance, safety, or maintenance. These codes, also known as Bosch fault codes, appear on your washer’s display or via LED blink patterns depending on the model.
Some Bosch washers feature full digital displays showing alphanumeric codes, while others use blinking lights or symbols to indicate a fault. Understanding these codes helps you identify problems quickly—from door lock issues to water supply errors—and take timely action for troubleshooting or repairs.
How Bosch Washing Machine Error Codes Work
Error codes appear when your washer detects a malfunction during operation. This could include problems such as:
Blocked drain or filter
Unbalanced load
Water supply issues
Electrical or mechanical faults
Knowing what the codes mean can help you perform simple resets or decide when to call a professional.
Comprehensive Bosch Error Code List and Their Meanings
| Code | Meaning | Common Cause |
|---|---|---|
| E16 / F16 | Door not closed | Door not shut properly or faulty door lock |
| E17 / F17 | Water fill issue | Tap closed, low water pressure, blocked inlet valve |
| E18 / F18 | Not draining | Clogged filter, kinked hose, defective drain pump |
| E19 / F19 | Heating time too long | Faulty heating element or temperature sensor |
| E20 / F20 | Unexpected heating | Control board error |
| E21 / F21 | Motor error | Jammed drum, worn brushes, or motor fault |
| E22 | AquaStop activated | Leak or water in base tray |
| E23 / F23 | Leak sensor triggered | Water leakage inside the machine |
| E24 | Pump failure | Damaged or blocked drain pump |
| E25 | Drain pump blocked | Debris in pump or pipe |
| E26 | Pressure sensor fault | Sensor not detecting water level correctly |
| E27 | Door lock error | Faulty latch or sensor |
| E28 | Flow sensor error | Incorrect water flow |
| E29 | Water pressure too low | Closed tap or restricted valve |
| E30 | Heating sensor issue | NTC sensor defective |
| E32 | Load imbalance | Uneven drum distribution or overloaded |
| E36 | AquaStop failure | Faulty hose or internal leak |
| E37 | Overfilling detected | Pressure switch or valve stuck |
| E38 | Blocked pressure chamber | Requires cleaning |
| E42 / E43 | Door unlocking issue | Mechanism jam or control board fault |
| E44 | Door opened mid-cycle | Safety override triggered |
| E45 | Communication error | Control module malfunction |
| E50 / F50 | Motor fault | Tachogenerator or motor driver error |
| F43 | Drum not turning | Motor jammed, worn brushes, faulty motor |
| E60 – E69 | Heating circuit faults | Related to sensors or heating element |
| E90 – E92 | Software or PCB error | Internal control board issue |
| CL / CHILD | Child lock activated | Safety lock; press Start for 5 sec to deactivate |
| NO | Water not entering | Tap closed or supply issue |
| END flashing | Program ended / drain issue | Check drainage |
For models without a digital display, LED blink patterns indicate specific faults. Consult your Bosch manual for model-specific guidance.
Resetting Bosch Washing Machine Error Codes
Some error codes can be cleared using a simple reset:
Power Cycle: Turn off and unplug the washer, wait 1–2 minutes, then reconnect and turn on.
Button Reset: Hold the Start/Reload button for 3–5 seconds on certain models.
⚠️ Note: Resetting does not fix underlying problems. Persistent errors like motor faults or leaks require professional repair.
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Which Bosch Error Codes Require Professional Repairs?
Some faults are complex and should only be handled by trained technicians:
E23 / F23: Leak sensor triggered
F43: Drum not turning
E36: AquaStop failure
E90 – E92: PCB or software errors
Ignoring these issues can cause further damage or safety hazards.
Why Bosch Error Codes Keep Reappearing
Common reasons for recurring errors include:
Temporary DIY fixes that don’t resolve the root cause
Worn or damaged components like pumps, motors, or sensors
Fluctuating water pressure
Software or firmware bugs
Professional inspection ensures lasting repair and prevents repeated errors.
Preventing Bosch Washing Machine Error Codes
Run self-test or diagnostic cycles periodically
Avoid interrupting cycles mid-program
Apply firmware updates if available
Schedule routine professional maintenance
Follow manufacturer usage guidelines
Need Bosch Washing Machine Repair?
If your Bosch washer keeps showing error codes or isn’t functioning properly, Appliance Solutions can help. Our certified technicians in Toronto and the GTA provide:
Fast, reliable Bosch error diagnostics
Same-day or emergency repairs
Genuine replacement parts
Expert advice to prevent recurring faults
Contact Appliance Solutions today to schedule a Bosch washing machine repair and keep your appliance running smoothly for years to come.
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