1998 Buick Riviera Owner's Manual

Temperature ButtonTo adjust the comfort level you want maintained insidethe car, push the TEMP button. If you want a warmercomfort level, push the red arrow. If you want a coolercomfort level, push the blue arrow. Your comfort settingis shown in the display.Fan ButtonThe speed of the blower fan is controlled automaticallyif you have the system set for AUTO. Pressing theFAN button will display and hold the current blowerfan setting.If you want the blower fan to run at a lower speed, pushthe bottom of the FAN button. The fan speed willdecrease with every push of the button until the lowestspeed is reached. If you want to increase the fan speed,push the top of the FAN button. Notice the fanj icators in the display.Mode ControlsPress the AIR FLOW button to deliver air through thefloor, middle or windshield outlets. The system will stayin the selected mode until the AUTO button is pushed.Press the up arrow on the AIR FLOW button to cyclethrough the available modes.Automatic OperationPress the AUTO button when you want the system toautomatically adjust the interior temperature to yourpreference. When the system is set for automaticoperation, air will come from the floor, middle orwindshield outlets depending on the temperature insidethe vehicle, the outside temperature and sun load. Fanspeed will vary as the system gets to and maintains thecomfort setting you have selected through the use of theTEMP button.To find your comfort setting, start with the system inAUTO mode and the TEMP button adjusted to a displayof 75 O F (24" C), give the vehicle about 20 minutes tostabilize, then readjust your comfort setting if necessary.The display will show the comfort setting for a fewseconds and then it will display the outside temperature.If you want to see your current automatic fan speed,airflow direction and comfort setting, press theAUTO button.In cold weather, the system will delay turning on thefan, to avoid blowing cold air. The length of the delaydepends on the engine coolant temperature and theoutside temperature. Pushing the FAN, AIR FLOWor FRONT buttons will override this delay, turn off theAUTO setting and change the fan speed.3-3