190E 2.6 (201.029) L6-2.6L (103.942) (1987)
Evaporator Temperature Sensor / Switch: Description and Operation
Temperature Sensor Locations
PURPOSE
The evaporator (cooling) temperature sensor, which is located in the evaporator housing, sends evaporator temperature information to the push-button
control unit for calculation of blend air flap position and other outputs.
CONSTRUCTION
The evaporator temperature sensor is a negative temperature coefficient (NTC) type resistor. As the surrounding temperature increases the resistance
decreases.
OPERATION
The temperature of the evaporator produces a resistance value in the sensor circuit. The resulting current flow in the sensor circuit is recognized by the
TCC control unit as a measurement of the evaporator temperature.