Your car's air conditioner may not be getting cold enough because the refrigerant level is low, airflow is restricted, or a system component is malfunctioning. A low refrigerant charge is common, but it is usually caused by a leak. Other possible causes include a clogged cabin air filter, a dirty condenser, a weak cooling fan, a failing compressor, a faulty expansion valve, a blend door problem, or an electrical issue. The AC may feel cooler while driving but warmer at idle if the condenser is not getting enough airflow. Humidity and extreme heat of the outside air can also make weak cooling more noticeable. A technician should check the AC vent temperature, system pressures, airflow, and for leaks to identify the actual cause of poor AC performance rather than guessing.

Auto Air Conditioning Service in Ann Arbor, MI