2009 Jeep Grand Cherokee Owner's Manual - Page 266

264 UNDERSTANDING YOUR INSTRUMENT PANEL Recirculation The recirculation feature can be selected with the mode control knob. You may choose between Bi-Level Recirculation and Panel Recirculation air outlets while in this mode. Normally, air enters from outside the vehicle. However, when in "Recirculation" mode air inside the vehicle is re-used. Use this mode to rapidly cool the inside of the vehicle. The "Recirculation" mode can also be used to temporarily block out outside odors, smoke, and dust. Air Conditioning To turn on the Air Conditioning, set the fan control at any speed and press the snowflake button located on the control panel. Conditioned air will be directed through the outlets selected by the mode control. A light in the snowflake button shows that the air conditioning is on. Slight changes in engine speed or power may be noticed when the air conditioning compressor is on. This is a normal occurrence as the compressor will cycle on and off to maintain comfort and increase fuel economy. Automatic Temperature Control - If Equipped The Automatic Temperature Control System automatically maintains the interior comfort level desired by the driver and passenger.