What does the 'AF' error code mean on my Maytag dryer?

The 'AF' code indicates a low airflow condition, typically caused by a clogged lint screen or vent, or a crushed/kinked vent. The dryer will continue to run when this code is present — press any key to clear it and return to the estimated time remaining. You should clean the lint screen, check the vent run for obstructions, and confirm the exterior exhaust hood is free of lint and debris. (Page 17)