2011 Chevrolet Cruze Owner's Manual - Page 193

Climate Controls Automatic Air Recirculation: When the AUTO indicator light is on, the air is automatically recirculated as needed to help quickly cool the inside of the vehicle. AQS (Air Quality Sensor): For vehicles with an air quality sensor, the climate control system adjusts to limit some exhaust fumes from being pulled inside your vehicle. Press the AQS button on the climate control to activate the air quality sensor. The air quality sensor will not maintain recirculation for an extended period to prevent the air inside the vehicle from becoming too dry or stuffy. To adjust the sensitivity of the Air Quality Control, see Climate and Air Quality under Vehicle Personalization on page 5‑33. Auto Defog: The climate control system may have a sensor to automatically detect high humidity inside the vehicle. When high humidity is detected, the climate control system may adjust to outside air supply and turn on the air conditioner. If the climate control system does not detect possible window fogging, it returns to normal operation. To turn Auto Defog off or on, see Climate and Air Quality under Vehicle Personalization on page 5‑33. 8-5 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 rear window defogger can be set to automatic operation, see Climate and Air Quality under Vehicle Personalization on page 5‑33. 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 40°F and below. The auto rear defogger turns off automatically after about 10 minutes. At higher speeds, the rear window defogger may stay on continuously. Rear Window Defogger = (Rear Window Defogger): Press to turn the rear window defogger on or off.