Amana NED Automatic Dryness Control & 240V Element Tumble Dryer: Air flow restriction warning code AF; control detects high differential temperature between heater and exhaust duct.
On Amana dryers (Amana 'Just the basics done right' rugged mechanical design and Vertical Modular Washer (VMW) platform): Lint screen completely blanketed with lint, bent metal exhaust ducting, or bird nest/debris blocking exterior wall termination hood.
Clean lint screen before every cycle. Wash screen with warm water and soap to remove wax. Inspect outside vent hood flapper while dryer is running to confirm exhaust air velocity. Disconnect power cord for 60 seconds. Inspect 91°C thermal fuse and restore power to reset electromechanical timer and circuit.
