Air Door Actuator / Motor: Description and Operation

The system also utilizes two bi-directional DC mode valve actuators. The actuators operate on signals from the A/C control that are inputs from the in-vehicle, outside air temperature, solar sensor, and the set temperature. As the actuators turn they move the temperature valves in the HVAC module to obtain the correct blend of heated air from the heater and cooled air from the A/C evaporator.