Whirlpool Dryer Error Code AF
Restricted airflow — vent partially blocked
The dryer's airflow sensor or thermal system has detected reduced exhaust airflow. A partial vent blockage is causing inefficient drying and potential overheating.
What Does Error Code AF Mean on a Whirlpool Dryer?
Restricted airflow — vent partially blocked.
The dryer's airflow sensor or thermal system has detected reduced exhaust airflow. A partial vent blockage is causing inefficient drying and potential overheating.
What Causes Error Code AF?
Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:
- 1 Lint buildup in exhaust duct 55% of cases
- 2 Crushed flexible duct 25% of cases
- 3 Exterior vent cap flap stuck closed or clogged 20% of cases
How to Fix Whirlpool Dryer Error Code AF
- 1
Clean lint filter
After every load.
- 2
Disconnect and clean exhaust duct
Full length cleaning with vent brush kit.
🔩 Dryer vent brush kit ($15–$35) - 3
Check exterior vent
Clear any lint or debris from exterior vent cap.
- 4
Replace flexible duct with rigid metal
For any run over 3 feet.
🔩 4-inch rigid metal duct ($15–$40/section)
How to Reset Error Code AF
After clearing duct, run Air Only cycle for 20 minutes.
Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.
When to Call a Professional
If duct is clear and AF persists, the airflow sensor may have failed.
Related Error Codes
Find Replacement Parts
Use these links to find the exact replacement parts for your Whirlpool Dryer:
External links — ApplianceErrors.com is not affiliated with these retailers.