Dryer displays AF and clothes take a very long time to dry or remain damp at the end of the cycle.

Safety first: Turn the dryer OFF and unplug it before inspecting vents. Do not run the dryer with a blocked vent; this is a fire hazard.

• Clean the lint screen: Remove the lint filter and clean off all lint with your fingers or a soft brush. Wash with warm soapy water if coated with fabric softener residue, then dry completely before reinstalling.
• Inspect the vent hose: Pull the dryer away from the wall. Check the flexible vent hose for kinks, crushing, or sharp bends. Straighten it and ensure it is not longer than necessary. Replace thin foil or plastic vent with rigid or semi-rigid metal ducting.
• Check for blockages: Disconnect the vent hose from the dryer outlet and look inside both the hose and the dryer outlet for lint buildup. Vacuum out any lint. Go outside and inspect the exterior vent hood; remove lint, nests, or debris and ensure the flap opens freely when pushed.
• Test airflow: With the vent hose disconnected, briefly plug in the dryer and run it on Air Only. You should feel strong airflow at the outlet. If airflow is strong at the dryer but weak at the exterior hood, the in-wall duct is restricted and may need professional cleaning.
• Reassemble and test: Reconnect the vent using metal clamps, avoid long runs and multiple elbows, then run a timed dry cycle to confirm improved drying performance.