Hyundai Santa Fe (TM): Air conditioning System / In-car Sensor. Description and operation

The In-car air temperature sensor is built in the heater & A/C control unit.

The sensor consists of a thermistor that measures the inside temperature. The signal decided by the resistance value that changes in accordance with perceived inside temperature, is delivered to heater control unit, and according to this signal, the control unit regulates in-car temperature to intended value.