Evaporator Temperature Sensor / Switch: Description and Operation
SYSTEM OPERATIONEvaporator Temperature Sensor Setpoint:
The evaporator temperature sensor is a temperature sensing element located at the coldest point on the face of the evaporator. Output from the probe is sampled by the Body Control Module (BCM). The sensor is used to switch the A/C compressor clutch OFF before evaporator freeze up occurs. The temperature setpoint at which the clutch is turned OFF varies with the outside ambient temperature. The temperature at which the clutch is turned ON is preset to 2° F above the OFF setpoint mentioned above. Refer to Evaporator Temperature Sensor Set-point table and for the correct setpoint.