740 L4-2320cc 2.3L DOHC B234F (Can) (1992)
![background image](/volvo/740/l4-2320cc_2.3l_dohc_b234f_(can)/Page-82001.png)
Cabin Temperature Sensor / Switch: Description and Operation
In Car Temperature Sensor - Electronic Climate Control
The In Car (Interior) Temperature Sensor:
^
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.