2014 Cadillac CTS Owner Manual - Page 242

8-6 Climate Controls Air Vents Use the air outlets in the center and on the side of the instrument panel to direct the airflow. Use the thumbwheels near the air outlets to open or close off the airflow. Operation Tips . Maintenance Passenger Compartment Air Filter The passenger compartment air filter traps most of the dust and pollen from the air entering the vehicle. The filter will need to be changed periodically. See Maintenance Schedule on page 11-4. Using the climate control system without the passenger air filter installed could let water or other debris enter the system. This could cause a water leak or noises. Make sure a new air filter is installed after removing the old one. Clear away any ice, snow, or leaves from air inlets at the base of the windshield that could block the flow of air into the vehicle. Keep the path under the front seats clear of objects to help circulate the air inside of the vehicle more effectively. Use of non-GM approved hood deflectors can adversely affect the performance of the system. Check with your dealer before adding equipment to the outside of the vehicle. . The passenger compartment air filter is under the hood below the windshield wiper arm and the screen on the passenger side of the vehicle. See Engine Compartment Overview on page 10-6 for more information on location. To replace the passenger compartment air filter: 1. Turn the ignition to ON/RUN with the engine off. .