F40Warning
Kenmore Dryer F40 Error Code
The display/user interface board is not communicating.
Common causes
- Faulty display board
- Loose ribbon cable
How to fix it
- Unplug dryer and reseat the ribbon cable between display and main board.
⚠ When to call a pro: If that doesn't work, replace display board – call a technician for safe disassembly.
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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.