2007 Chrysler Aspen Owner's Manual - Page 234

234 INSTRUMENT PANEL AND CONTROLS engine speed or power may be noticed when the compressor cycles. This is a normal occurrence since the compressor will cycle on and off to maintain comfort and improve fuel economy. Front Blower Control The Front Blower controls the amount of air delivered to the passenger compartment. There are four blower speeds. The fan speed increases as you turn the control clockwise. When the front blower control is turned to OFF, the blower will be turned off and the system will be positioned in recirculation mode. Front Mode Control The mode control allows you to choose from several patterns of air distribution. NOTE: To improve your selection choices, the system allows you to operate at intermediate positions between the major modes. These intermediate positions are identified by the small dots and give an even blend of both modes.