Evaporator Temperature Sensor
WARNING: This page is about a different car, the 2015 Land Rover LR2, 2014 Land Rover LR2, and 2013 Land Rover LR2. However, it is still accessible from the selected car via links, so may be relevant.
The evaporator temperature sensor is a NTC (negative temperature coefficient) thermistor. The sensor is mounted on the left side of the heater casing, and measures the temperature of cooled air once it has traveled over the evaporator. The sensor receives a 5 V reference feed from the ATC module. By monitoring the returned voltage, the ATC module can calculate the resistance of the sensor, and hence the evaporator temperature.