1997 Buick Riviera Owner's Manual - Page 146

Operating RECIRC in cold temperature or under high Air Conditioning humidity conditions may cause moisture to formthe on On very hot days, open the windows 1ong.enough to le inside of the windshield. If this condition occurs, the hot air out. This reduces the time requiredcool to deselect the RECIRC button. If the interior of the vehicle to a comfortable level.the FRONT This selection is used to defrost the system isin the AUTO mode on very hot days,.the windshield by directing the airflow toward the windshield. system will automatically enter the RECIRC mode and will the the temperature door be positioned at full cold If FRONT is selected while in AUTO mode,the the position for maximum cooling. If the systemnot in is fan speed andthe air temperature from the front the AUTO mode, RECIRC should be selectedprovide to defroster will vary.If a manualfan speed settingis selected, the fan speed will remain at that selection until maximum cooling. You can choose the extreme comfort setting of 60°F (16"C), but the system will not cool another fan speed selectionis made or the AUTO mode any faster by choosing extreme comfort setting. the is selected.To turn off FRONT, pressthe AUTO or AIR FLOW button. Heating FRONT defrost will work better any ice or snow is if cleared from the hood andthe air inlet area betweenthe base of the windshield and the hood. On cold days, if AUTO mode is selected, the system the will automatically direct air toward the floor andthe the temperature door will positioned at the hot be full position. You can choose the extreme comfort setting of 90°F (32°C) but the system will not warm up any faster by selecting the extreme comfort setting.If the outside temperature is cold, the will be delayed to avoid fan blowing cold air. Pushing FAN, AIRFLOW or the FRONT buttonswill override this delay, turn off the AUTO mode and changethe fan speed. 3-5