Cabin Temperature Sensor / Switch: Description and Operation

In-Vehicle Air Temperature Sensor
The In-Vehicle air temperature sensor is located in the Instrument Panel (I/P) to the left of center. To provide interior air temperature sensing, a small amount of air is drawn into the sensor housing and passed over the thermistor. The air movement is accomplished by using an aspirator mounted on the top of the HVAC module. Air flow from the HVAC module creates a slight vacuum at one end of the aspirator which draws In-Vehicle air through the sensor housing and over the thermistor.