F40Warning
Miele Dryer F40 Error Code
The door switch is not signaling that the door is closed.
Common causes
- Door switch stuck or broken
- Wiring to switch damaged
- Door not closed properly
How to fix it
- Ensure door is fully closed
- Check if switch clicks when door closes
- Clean switch area
⚠ When to call a pro: If error persists after checking door and switch operation.
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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.