2008 Chrysler PT Cruiser Owner Manual - Page 286

284 UNDERSTANDING YOUR INSTRUMENT PANEL Window Fogging Vehicle side windows tend to fog on the inside in mild rainy or humid weather. To clear the windows, use the A/C, PANEL and blower controls. Direct the panel outlets toward the side windows. Do not use recirculate without A/C for long periods as fogging may occur. Interior fogging on the windshield can be quickly removed by using the defrost position. If the fogging problem persists, clean the inside window surfaces. The cause of undue fogging may be dirt collecting on the inside surface of the glass NOTE: In cold 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, use the Outside Air position. Summer Operation Vehicles must be protected with a high-quality antifreeze coolant to provide proper corrosion protection and to raise the boiling point of the coolant for protection against overheating. A 50% concentration is recommended. Outside Air Intake When operating the system, make sure the air intake, directly in front of the windshield, is free of ice, slush, snow or other obstructions such as leaves. Leaves collected in the air-intake plenum may reduce air flow and plug the plenum water drains. The blower air will heat faster in cold weather if you use only a low blower speed for the first few minutes of vehicle operation.