F21Warning
Kenmore Dryer F21 Error Code
The dryer detects restricted airflow due to a blocked lint screen or vent system.
Common causes
- Lint screen full
- Vent hose kinked or clogged
- Long or restrictive duct run
How to fix it
- Clean the lint screen thoroughly.
- Check and straighten the vent hose; remove any lint buildup.
- Ensure the outdoor vent flap opens when dryer runs.
⚠ When to call a pro: If cleaning doesn't resolve and you've checked the entire vent path, call a technician to inspect internal ducting.
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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.