Automotive air conditioning (HVAC) actuators are used for damper control to create a comfortable interior environment by changing damper Angle, adjusting supply air temperature, blowing mode, internal circulation, etc. Automatic air conditioning Temperature Control system working principle: automotive Automatic Temperature Control (ATC), commonly known as constant temperature air conditioning system; Once the target temperature is set, the ATC system automatically controls and adjusts the temperature in the car to maintain the set value.