2001 Cadillac Catera Owners Manual - Files

In cold weather, when the system senses the need forheat, airflow will be directed out of the floor outlets. Asthe interior temperature approaches a desired setting, thefan speed will decrease. To maintain interior comfort,the airflow may move to the instrument panel air outletsand floor outlets (bi-level mode). On bright sunny daysin cold weather, the airflow may come out of the airconditioning outlets (AC mode) to maintain comfort andprevent stuffiness.If your vehicle is sitting out on a hot day and you havethe climate control system set for automatic operation,the air will first flow out of the floor air outlets duringcool down. That is normal. This is to remove hot airfrom the air outlets. As the air is cooled, the airflow willmove through the air conditioning outlets.To avoid blowing cold air in cold weather, the systemwill delay turning on the fan until warm air is available.The length of delay depends on the outside airtemperature, engine coolant temperature or the timesince the engine was last started. As the coolantwarms up, the fan speed will gradually increase andair will flow from the heater outlets, with some airflowto the windshield to prevent fogging under mostnormal conditions.If you leave your vehicle, the system will remember thecontrol setting the next time you start your engine,except for recirculation and rear defrost (heatedbacklite). Each ignition cycle cancels recirculation.Manual OperationYou may manually adjust the air delivery mode orfan speed.HEATER/DEFROST: This setting directs air tothe floor outlets and toward the windshield.AC: This setting directs airflow through the middleinstrument panel outlets.BI-LEVEL: This setting directs air into yourvehicle in two ways. Cool air is directed to the upperportion of your body through the middle instrumentpanel outlets while warm air is directed to the floor.HEATER: This setting directs warm air throughthe floor outlets. Some warm air is sent to thewindshield to minimize fogging.3-4