What does the 'AF' error code mean and how do I fix it?

The 'AF' code indicates a low airflow condition. Try cleaning the lint screen, checking if the vent run from the dryer to the wall is crushed or kinked, confirming the vent is free of lint and debris, checking the exterior vent exhaust hood, and verifying your vent system falls within recommended run length. If the message persists, have your entire home venting run cleaned. (Page 28)