1998 Buick Riviera Owner's Manual

Manual OperationThe ventilation system always allows fresh air to flowYou may also manually adjust the air delivery or fan speed.through the interior when the vehicle is moving evenwith the system in the OFF mode.AIR FLOW This button is used to change the directionof the airflow. The airflow choices available are FLOOR,VENT The VENT button allows outside air to flowthrough your vehicle without the air conditioningFLOOR-MID, MID and WINDSHIELD-FLOOR.If the system is set for AUTO, pressing AIR the FLOWcompressor working. Selecting VENT and the AUTObutton will display the current airflow direction and thebutton at the same time allows the system to controlcomfort setting. Press the AIR FLOW up or downautomatically without the use of the air conditioningbutton again to change the direction of the airflow.compressor or the use of the RECIRC mode. To turnoff the VENT selection, push the VENT button again.If the AIR FLOW up button is selected while in theFRONT defrost mode, the system will direct the airRECIRC: When RECIRC is selected, the system willtoward the WINDSHIELD. If the AIR FLOW downlimit the amount of outside air entering your vehicle.button is selected while in the FRONT defrost mode, theThis is helpful when you are trying to cool the interiorsystem will direct the air toward the FLOOR, and theof the vehicle quickly or limit the amount of outside airFRONT defrost mode will cancel. Notice the arrows inentering your vehicle for some other reason. RECIRCthe display.and AUTO may be selected at the same time. Thesystem will remain in RECIRC until the ignition isOFF: If the passenger's comfort control is turned on, it turned off, then the system will return back to thecan be turned off by pressing the OFF button once. previously selected mode. RECIRC can be selected inPressing the OFF button a second time will turn off the all manual airflow modes except FRONT defrost.main system. Turning off the main system causes the fan RECIRC cannot be selected with the VENT button.to turn off and the airflow to be directed to the FLOOR.The system will still try to keep the interior of theOperating RECIRC in cold temperature or under highvehicle at the previously chosen comfort setting. Thehumidity conditions may cause moisture to form on theoutside temperature will show on the display when theinside of the windshield. If this condition occurs,system is set to OFF.deselect the RECIRC button.3-4