F13Serious
Bosch Dryer F13 Error Code
The heating system is not functioning, possibly due to an open heating element or blown thermal fuse.
Common causes
- Open heating element
- Blown thermal cut-out (fuse)
- Faulty heater relay on board
How to fix it
- Unplug dryer and measure resistance of heating element (should be ~10-30 Ω).
- Check thermal fuse continuity (should be closed).
- Inspect wiring to heater for damage.
⚠ When to call a pro: If heating element or thermal fuse is open, replace them; if relay, replace control board.
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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.