Amana Dryer Error Code AF — Restricted Airflow
What this means
The AF error code on Amana dryers means the exhaust airflow is restricted, which can lead to longer drying times and overheating. This is most commonly caused by a clogged lint filter, a blocked or kinked exhaust vent hose, or a buildup of lint in the external vent duct. This is a serious safety concern as restricted airflow is a leading cause of dryer fires.
Alternate codes: Af
Step-by-step fix
4 stepsClean the lint filter
Remove the lint filter and clean off all lint. If the filter has a residue film from dryer sheets, wash it with warm soapy water and let it dry completely before reinstalling.
A clogged lint filter can reduce airflow by 75%. Clean it before every load.
Check the exhaust vent hose
Pull the dryer away from the wall and disconnect the exhaust vent hose from the back of the dryer. Look inside the hose and dryer exhaust port for lint buildup. Clean out any accumulation.
Replace crushed foil-style vent hoses with rigid or semi-rigid metal duct for better airflow.
Clean the exterior vent duct
Go outside and check the vent hood where the duct exits your home. Remove the cover and clean out any lint buildup. Use a dryer vent brush kit to clean the entire duct run from inside to outside.
Vent runs longer than 25 feet (or with multiple elbows) should be cleaned professionally at least once a year.
Check the exterior vent flap
Ensure the vent flap opens freely when the dryer runs. A stuck or damaged flap can restrict airflow. Replace if it does not open and close properly.
Bird nests and debris can block exterior vents — inspect seasonally.
When to call a professional
If you cannot access the full length of the vent duct (especially through walls or ceilings), hire a professional vent cleaning service. Long or complex duct runs require specialized equipment.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Rigid Aluminum Vent Duct (4-inch)
Part #Universal · $10–$25
If existing vent hose is crushed or damaged
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