In Car Temperature Sensor - Electronic Climate Control

- Interior temperature sensor is resistor of the NTC (negative temperature coefficient) type, the resistance of which falls with rising temperature. The resistance is 9.9K Ohms at 25 °C (77 °F).

- Located in the roof light, measures the temperature in the passenger compartment at head level. The device is ventilated by means of a tube from the intake manifold, through which air is drawn through the sensor

- The system FUNCTIONS even if a sensor is faulty. To prevent the entire unit from being disabled if a sensor becomes faulty, the system is programmed to continue operating in a more or less normal manner in this event. However, it will react more slowly and will control the temperature less precisely. The A/C button will FLASH to indicate the presence of a fault.