2008 Dodge Nitro Owner Manual - Page 238

238 INSTRUMENT PANEL AND CONTROLS Circulation Control Press the mode control knob to activate the recirculation mode. A lamp (in the knob) will illuminate when you are in recirculate mode. Press the knob again to deactivate the system. Only use the recirculation mode to temporarily block out any outside odors, smoke, or dust and to cool the interior rapidly upon initial start up in very hot or humid weather. NOTE: Continuous use of the recirculation mode may make the inside air stuffy and window fogging may occur. Extended use of this mode is not recommended. In cold or damp weather, the use of the recirculation mode will cause windows to fog on the inside because of moisture build up inside the vehicle. For maximum defogging, select the Outside Air position. NOTE: Recirculation mode will not operate in floor, mix or defrost modes. Air Conditioning Operation Press the temperature control knob to activate the air conditioning mode. A lamp will illuminate when the Air Conditioning System is engaged. Press the knob again to deactivate the system. NOTE: The air conditioning compressor will not engage until the engine has been running for about 10 seconds.