2010 Jeep Grand Cherokee Owner's Manual - Page 232

UNDERSTANDING YOUR INSTRUMENT PANEL 231 defrost/floor modes. Attempting to use Recirculation Regular cleaning of the inside of the windows with a while in these modes will cause the LED in the button to non-filming cleaning solution (vinegar and water works very well) will help prevent contaminates (cigarette blink and then turn off. smoke, perfumes, etc.) from sticking to the windows. Operating Tips Contaminates increase the rate of window fogging. Window Fogging Summer Operation Windows will fog on the inside when the humidity inside Air conditioned vehicles must be protected with a high the vehicle is high. This often occurs in mild or cool quality antifreeze coolant, during the summer, to provide temperatures when it's rainy or humid. In most cases, proper corrosion protection and to raise the boiling point turning the air conditioning (pressing the snowflake of the coolant for protection against overheating. A 50 % button) on will clear the fog. Adjust the temperature concentration is recommended. Refer to Fluids, Lubricontrol, air direction, and blower speed to maintain cants, and Genuine Parts in "Maintaining Your Vehicle" comfort. for the proper coolant type. As the temperature gets colder, it may be necessary to When using the air conditioner in extremely heavy direct air onto the windshield. Adjust the temperature traffic, in hot weather, especially when towing a trailer, control and blower speed to maintain comfort. Higher additional engine cooling may be required. If this situablower speeds will reduce fogging. Interior fogging on tion is encountered, operate the transmission in a lower the windshield can be quickly removed by selecting the gear to increase engine RPM, coolant flow and fan speed. defrost mode. 4