2008 Dodge Ram 2500 Pickup Owner Manual Diesel - Page 256

254 UNDERSTANDING YOUR INSTRUMENT PANEL the windshield, and the demister outlets located at the edge of each side of the instrument panel, and the air conditioning may be on. NOTE: The air conditioning compressor operates in both Mix and Defrost or a blend of these modes, even if the A/C button has not been pressed. This dehumidifies the air to help dry the windshield. Blower Control The rotary knob on the left of the control panel is the blower control. Turn the knob clockwise to one of the four positions to obtain the blower speed you desire. To turn the blower off, turn the knob to the far left position. Temperature Control The rotary knob at the center of the control panel controls the temperature of the interior air. You can choose your degree of comfort by rotating the knob. The coldest temperature setting is to the extreme left (blue region) and the warmest setting is to the extreme right (red region) of the rotation. Circulation The cab is designed with features to promote outside air circulation. There are grilles in the cab back panel. These are air exhausters that provide the means for regular exchange of cab air.