2005 Chrysler PT Cruiser Owner's Manual - Page 187

UNDERSTANDING YOUR INSTRUMENT PANEL 187 This control only operates in the Outside Air and Recirculate modes; there is no in between position. Do not place the control between these positions. NOTE: Continuous use of the recirculate 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 Recirculate position will cause windows to fog on the inside because of moisture build up inside the vehicle. For maximum defogging, select the Outside Air position. If the mode control is in the range between Mix and Defrost and you choose the recirculate mode, the mode control knob will automatically move to the left of the Mix position. NOTE: If you choose Defrost mode and the Circulation control is in the recirculate Mode, the system will automatically switch to the Outside Air mode and the knob will move to that position. 4