1998 Buick Riviera Owner's Manual

FRONT This selection is used to defrost thewindshield by directing the airflow toward the windshield.If FRONT is selected while in the AUTO mode,the fan speed and the air temperature from the frontdefroster will vary. If a manual fan speed setting isselected, the fan speed will remain at that selectionuntil another fan speed selection is made or the AUTOmode is selected. To turn off FRONT, press the AUTOor AIR FLOW button.FRONT defrost will work better if any ice or snow iscleared from the hood and the air inlet area between thebase of the windshield and the hood.Air ConditioningOn very hot days, open the windows long enough to letthe hot air out. This reduces the time required to cool theinterior of the vehicle to a comfortable level. If thesystem is in the AUTO mode on very hot days, thesystem will automatically enter the RECIRC mode andthe temperature door will be positioned at the full coldposition for maximum cooling. If the system is not inthe AUTO mode, RECIRC should be selected to providmaximum cooling. You can choose the extreme comfortsetting of 60°F (16"C), but the system will not cool anyfaster by choosing the extreme comfort setting.HeatingOn cold days, if the AUTO mode is selected, the systemwill automatically directhe air toward the floor and thetemperature door will be positioned at the full hotposition. You can choose the extreme comfort setting of90°F (32°C) but the system will not warm up any fasby selecting the extreme comfort setting. If the outsidetemperature is cold, the fan will be delayed to avoid. r-blowing cold air. Pushing the FAN, AIR FLOW or'FRONT buttons will override this delay, turn off theAUTO mode and change the fan speed..3-5