1999 Oldsmobile Aurora Owner's Manual - Page 148

yellowblue Air Conditioning The air conditioner cools, dehumidifies and filters the air for the inside of the vehicle. The air conditioning compressor is enabled in all modes unless the A/C ON button is in the off position (the indicator light will not be illuminated). However, the air conditioning compressor will not operate when the outside temperature is below 42_F (7_C). When the air conditioner is on, you may sometimes notice slight changes in your vehicle's engine speed and power. This is normal, because the system is designed to cycle the compressor on and off to keep the desired cooling and help fuel economy. On very hot days, open the windows long enough to let the hot air out. This reduces the time required to cool the interior of the vehicle to a comfortable level. If the system is in the automatic mode (AUTO-PUSH knob indicator light is on), during very hot days the system will automatically go to the RECIRC ON mode and the temperature door will be positioned at the full cold position for maximum cooling. You can choose the extreme comfort setting of 60_F (16_C), but the system will not cool any faster by choosing the extreme comfort setting. Heating In cold weather, if the automatic mode is selected (AUTO-PUSH knob indicator light is on), the system will automatically direct the airflow out of the lower floor outlets and the temperature door will be positioned at the full hot position. You can choose the extreme comfort setting of 90_F (32_C), but the system will not warm up any faster by selecting the extreme comfort setting. In cold weather, the system will delay turning on the fan to avoid blowing cold air. The length of the delay depends on the engine coolant temperature and the outside temperature. The fan speed will increase as the temperature of the engine coolant increases. Turning the AUTO FAN knob will override this delay by turning off the automatic fan control mode and changing the fan speed. 3-6