1999 Pontiac Bonneville Owner's Manual - Page 150

First Edition for Pontiac Bonneville Owner's Manual - 1999 Mode Button Press this button to deliver air through the floor, middle or windshield outlets. The system will stay in the selected mode until the MODE or AUTO button is pushed. Press the up arrow to cycle through the available modes. Automatic Operation When the system is set for AUTO, sensors will control the air delivery mode. Air will come from the floor, middle and windshield outlets. The fan speed will vary as the system maintains the selected temperature setting. To find your comfort zone, start with 75_ F (24_ C) temperature setting and allow about 20 minutes for the system to regulate. Press the TEMP button up or down to adjust the temperature setting if necessary. If you choose the temperature setting of 60_F (15_C), the system will remain at that maximum cooling setting and will not regulate the fan speed. If you choose the temperature setting of 90_F (33_C), the system will remain at that maximum heating setting and will not regulate the fan speed. Choosing either maximum setting will not cause the system to heat or cool any faster. yellowblue Pressing the AUTO button will display the requested temperature, fan speed and air delivery mode for five seconds, then change to display the outside air temperature. Be careful not to put anything over the sensor located in the middle of the instrument panel near the windshield, or over the sensor in the grille above the radio. These sensors are used by the automatic system to regulate temperature. The exterior temperature display sensor is in front of the vehicle, near the radiator. The displayed temperature is most accurate when the vehicle is moving. During stops, or while idling, the display shows the previous driving temperature for best system control. To avoid blowing cold air in cold weather, the system will delay turning on the fan until warm air is available. The length of delay depends on outside air temperature, engine coolant temperature, and time since the engine was last started. Pushing the fan button will override this delay and change the fan to a selected single speed. If you leave your vehicle, the system will remember the control setting the next time you start your engine. 3-4