F21Warning
KitchenAid Dryer F21 Error Code
Airflow is restricted, causing poor drying or overheating.
Common causes
- Clogged lint screen
- Blocked vent duct
- Restricted exhaust path
How to fix it
- Clean lint screen thoroughly.
- Disconnect duct and check for blockages; clean if needed.
- Ensure vent flap opens easily.
⚠ When to call a pro: If airflow remains poor after cleaning, call a pro to check duct runs.
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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.