AF — Airflow Restriction
AF (Air Flow) warns that the dryer detected restricted exhaust airflow. It is a venting warning, not a part failure.
- Keep using it?
- Yes, with caution
- DIY difficulty
- Easy
- Typical cost
- $15-30
- Verified against
- producthelp.whirlpool.com ↗
The fix
Dryer vent cleaning kit
Restricted airflow
Diagnose first: Clean the entire vent line from dryer to exterior wall — not just the lint screen. AF often follows years of skipped vent cleaning and is a fire risk.
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How to fix it
- Clean the lint filter (wash it if it has softener film).
- Clean the vent hose and the full wall-duct run.
- Clear the exterior vent flap of lint.
Why it happens
Typical signs: Long dry times · Clothes still damp · AF on the display
- Clogged lint filter Clean it every load; fabric-softener film also chokes airflow.
- Blocked vent run Lint in the vent hose, wall duct, or exterior flap.
Related repair guides
More Whirlpool dryer codes
Frequently asked questions
What does the AF code mean on a Whirlpool dryer?
AF (Air Flow) warns that the dryer detected restricted exhaust airflow. It is a venting warning, not a part failure.
What causes the AF code on a Whirlpool dryer?
Clogged lint filter: Clean it every load; fabric-softener film also chokes airflow. Blocked vent run: Lint in the vent hose, wall duct, or exterior flap.
Is it safe to keep using a Whirlpool dryer with a AF error?
Yes, with caution. This is rated a moderate-severity fault.
How do I fix AF on a Whirlpool dryer?
Clean the lint filter (wash it if it has softener film). Clean the vent hose and the full wall-duct run. Clear the exterior vent flap of lint.
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: producthelp.whirlpool.com.