1998 Cadillac DeVille Owner's Manual - Page 174
1998 Cadillac DeVille Manual
Page 174 highlights
Mode Button Press this button deliver air through the floor, middle to or windshield outlets.The system will stay in the selected mode until MODE button is pushed again. the Press the up or down arrow to cycle through the available modes. Automatic Operation When the system is set for automatic operation, sensors will control the air delivery mode. Air will come from the floor, middleor windshield outlets.The fan speed will vary asthe system maintains the selected temperature setting. Be careful not to put anything over solar sensor the located in the middleof the instrument panel near the windshield. This sensor is used by the automatic system to regulate temperature. To find your comfort zone, start with the (24°C) 75°F setting and allow about 30 minutes for the system to regulate. Turnthe TEMP/AUTO knobto adjust the temperature if necessary. If you choose 60"F (16 " C), the system will remain at that maximum cooling setting and will not regulate speed. If you choose the fan at temperature of 90°F (32"C), the system will remain that maximum heating setting and will not regulate fan speed. Choosing either maximum setting will not cause the system to heat orcool any faster. With the automatic setting, the air conditioning compressor automatically cycles when needed to cool the air. In cold weather, when the system senses the need for heat, the airflow will be directed out the floor a outlets. As the interior temperature approaches desired To setting, the blower speed will decrease. maintain interior comfort, the airflow may movethe instrument to panel air outlets and floor outlets (bi-level mode). On bright sunny daysin cold weather,the airflow may come out of the air conditioning outlets (AC mode) to maintain comfort and prevent stuffiness. If your vehicle is sitting out on a hot day and you have it set on AUTO, the air will first flow out the floor air outlets for a few seconds. That normal. This is to is expel hot air from the air outlets.As the air is cooled, the airflow will move through the air conditioning outlets. If you start your vehicle withthe fan setting on HI, it will skip the air conditioning purge. To avoid blowing cold air cold weather, the in system will delay turning on the fan until warm air is available. The length of delay depends the outside on air temperature,engine coolant temperatureor the time since the engine was last started. the coolant warms As up, the blower fan speed will gradually increase and air will flow from heater outlets, with some the airflow to the windshield to prevent fogging under most normal conditions. 3-7