2003 Chevrolet TrailBlazer Owner's Manual - Page 179
2003 Chevrolet TrailBlazer Manual
Page 179 highlights
Manual Operation You may manually adjust the air delivery mode or fan speed. Use the mode button to cycle through the following four air delivery modes: (Panel): This setting will deliver air to the instrument panel outlets. (Bi-Level): This setting will deliver warmer air to the floor and cooler air to the instrument panel outlets. (Floor): This setting will deliver air to the floor outlets. (Defog): This setting will deliver air to the floor and windshield outlets. OFF: Press this button to turn the system off. Some fresh air will continue to flow through the vehicle from the floor outlets. The system will try to maintain the previously chosen temperature setting. (Recirculation): Press this button to limit the amount of outside air entering your vehicle. This is helpful when you are trying to limit odors entering your vehicle and for maximum air conditioning performance in hot weather. Press this button again to allow outside air to enter the vehicle If you select recirculation while in defrost, defog or floor, the light on the button will flash and go out to let you know this is not allowed. This is to prevent fogging. When the weather is cool or damp, operating the system in recirculation for extended periods of time may cause fogging of the vehicle's windows. To clear the fog, select either defog or FRONT defrost. Be sure A/C OFF is not selected to allow the air conditioning compressor to run automatically and help dehumidify the air. (Air Conditioning): Press this button to turn the air conditioning compressor on and off. When air conditioning is selected or in AUTO mode, the system will run the air conditioning automatically to cool and dehumidify the air entering the vehicle. If you select A/C OFF while in FRONT defrost, the A/C OFF text will flash to let you know this is not allowed. This is to prevent fogging. FRONT (Defrost): Press this button to defrost the windshield. The system will automatically control the fan speed if you select defrost from AUTO. If the outside temperature is 40_F (4_C) or warmer, your air conditioning compressor will automatically run to help dehumidify the air and dry the windshield. 3-7