2003 Nissan Xterra Owner's Manual - Page 108

VENTILATORS HEATER AND AIR CONDITIONER (manual) WARNING ● The air conditioner cooling function operates only when the engine is running. ● Do not leave children, impaired adults, or pets alone in your vehicle. They could accidentally injure themselves or others through inadvertent operation of the vehicle. Also, on hot, sunny days, temperatures in a closed vehicle could quickly become high enough to cause severe or possibly fatal injuries to people or animals. WHA0223 Adjust air flow direction for the driver's side, center, and passenger side ventilators by moving the ventilator slide and/or ventilator assemblies. ● Do not use the recirculation mode for long periods as it may cause the interior air to become stale and the windows to fog up. ● Positioning of the heater and/or air conditioner controls should not be done while driving so full attention may be given to vehicle operation. 4-2 Heater, air conditioner and audio systems