2008 Hummer H3 Alpha Owner's Manual - Page 157
2008 Hummer H3 Alpha Manual
Page 157 highlights
The air conditioning will not function if the fan is turned off. If air conditioning is selected with fan off, the indicator light flashes three times and then turns off. A slight change in engine performance may occur when the air conditioning compressor shuts off and turns on again. This is normal. The system is designed to make adjustments to help with fuel economy while still maintaining the selected temperature. The air conditioning system removes moisture from the air, so sometimes there may be a small amount of water dripping underneath the vehicle while idling or after turning off the engine. This is normal. this button to turn the recirculation mode on or off. An indicator light on the button comes on to show that the recirculation mode is activated. Recirculation is available in the bi-level, and vent modes. Recirculation is not available while in floor, floor/defog and defrost mode. If recirculation is selected in these modes, the indicator flashes three times indicating it is not available in that mode. When the recirculation mode is turned on, the air conditioning turns on automatically. When it is hot enough outside, the recirculation mode may turn on automatically to help improve cooling performance. The indicator light will be lit to show this mode is active. If the recirculation button is pressed while in this mode, the light will flash three times and stay on to indicate that recirculation may not be shut off. The right knob on the control panel is used to direct the airflow inside the vehicle. In-between modes are available by moving the right control knob between modes with symbols. The in-between mode is a combination of the two modes that the control is centered between. Turn the right knob to select one of the following modes: 9 (Fan): Turn the center knob on the control panel to control the fan speed. Turn the knob clockwise or counterclockwise to increase or decrease the fan speed. 9 (Off): Turn the center knob to this position to turn the fan off. With the fan off, you may still experience airflow from the system that increases with vehicle speed depending on the mode and temperature settings. Enable recirculation mode to stop this airflow from occurring. @ (Recirculation): Press the center of the fan control knob to recirculate air inside the vehicle and prevent outside air from coming in. It can be used to prevent outside odors from entering the vehicle and cool the air inside the vehicle more quickly. Press H (Vent): This mode directs air to the instrument panel outlets. 3-23