2012 Buick LaCrosse Owner Manual - Page 265

Climate Controls 8-3 - (Defog): Clears the windows of fog or moisture. Air is directed to the windshield and floor outlets. 0 (Defrost): Clears the windshield of fog or frost more quickly. Air is directed to the windshield. Selecting defrost will disable automatic control. For best results, clear all snow and ice from the windshield before defrosting. automatically as needed. When the indicator light is on, the air conditioner runs automatically to cool the air inside the vehicle or to dry the air needed to defog the windshield faster. Rear Window Defogger = (Rear Window Defogger): Press to turn the rear window defogger on or off. The rear window defogger turns off automatically after about 10 minutes. If turned on again it runs for about five minutes before turning off. The defogger can also be turned off by turning the ignition to ACC/ACCESSORY or LOCK/OFF. The rear window defogger can be set to automatic operation. See "Climate and Air Quality" under Vehicle Personalization on page 5‑43. When auto rear defog is selected, the rear window defogger turns on automatically when the interior temperature is cold and the outside temperature is about 4°C (40°F) and below. The auto rear defogger turns off automatically after about 10 minutes, or after five minutes if the outside temperature is not as cold. # (Air Conditioning): Press to turn the air conditioning system on or off. If the fan is turned off or the outside temperature falls below freezing, the air conditioning system will not run. Pressing this button cancels automatic air conditioning and turns off the air conditioner. Press AUTO to return to automatic operation and the air conditioner runs > (Recirculation): Press to alternate between recirculating air inside the vehicle or pulling in outside air. When the indicator light is on, air is being recirculated inside the vehicle. This helps to quickly cool the air inside the vehicle or prevent outside air and odors from entering. Pressing this button cancels automatic recirculation. Press AUTO to return to automatic operation and recirculation runs automatically as needed.