F20Warning
Bosch Dryer F20 Error Code
The dryer is taking too long to reach the set temperature, indicating slow heating or airflow issues.
Common causes
- Partial blockage of exhaust duct
- Low voltage from power supply
- Failing heating element
How to fix it
- Clean lint filter and check exhaust vent for restrictions.
- Check that dryer is on a dedicated circuit with proper voltage (230V).
- Run a test cycle with small load to see if temperature rises.
⚠ When to call a pro: If duct is clear and voltage correct, heating element may need replacement.
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Always unplug the appliance (and turn off the water for washers/dishwashers) before inspecting. These guides are for information only and are not a substitute for a professional repair.