1997 Buick Riviera Owner's Manual - Page 148

Ventilation Tips 0 Keep the hood and front air inlet free of ice, snow or any other obstruction such as leaves. heater and The defroster will work better, reducing chance of the fogging your windows. Keep the air path under thefront seats clear of objects. This helps air to circulate throughout your vehicle. When the engine idles for a long time, the exterior temperature sensor retains temperature setting the that was present when vehicle waslast moving. the The system will try to maintain set temperature the inside your vehicle. Defogging and Defrosting Use theFRONT button to quickly remove fog, frost or ice from the windshield extremely humid or cold conditions in Select theFRONT button to defrost the windshield. at By choosing this button, airflow will be directed the the windshield. Adjust your comfort level by pressing the TEMP up or down arrow. fan speed will be The controlled by the system. can changethe fan speed You by pressing the top of the FAN button to increase speed, and the bottom of the button to decrease speed. 3-7