Temperature Control Selector
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, 2002 Chevrolet RV Cutaway, and 2002 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
Temperature control selector regulates temperature of air entering passenger compartment through an electric motor mounted on blend-air door. In cold position, air by-passes heater core to provide maximum cooling. In hot position, the door routes all air through the heater core, providing hot air. By moving the temperature selector to any position between hot and cold, a mixture of hot and cold air is blended, creating warm air.