1999 Buick Riviera Owner's Manual - Page 144

yellowblue Comfort Controls This section describes how to operate your climate control system. Your climate control system uses ozone-friendly R-134a refrigerant. Dual Automatic ComforTemp Climate Control Your vehicle has the Dual Automatic ComforTemp Climate Control system. The following information tells you how it works. You will hear a beep each time a button is pushed and a small light on the button will indicate which buttons are active. The lights are on all buttons except TEMP, FAN and AIR FLOW. The display will show fan speed, comfort level setting and airflow direction for a few seconds whenever AUTO is selected, and then it will display the outside temperature. The outside temperature reading is most accurate when the vehicle is moving. During stops, the display shows the previous temperature for best accuracy and system control. If the display is flashing after the climate control system is started, there is a problem with the system and you should see your dealer for service. Sun and temperature sensors automatically adjust the air temperature, the airflow direction and the fan speed to maintain your comfort setting. The system may supply cooler air to the side toward the sun. Be careful not to put anything over the sensors on top of the dash. 3-2