Evaporator Temperature Sensor / Switch: Description and Operation

EVAPORATOR PROBE
The evaporator probe is a temperature sensing element located at the coldest point on the face of the evaporator. Output from the probe is sampled by the Powertrain Control Module. It is used to switch the clutch OFF before evaporator freeze up occurs. The clutch is switched OFF when the probe temperature reaches 1.1°C (34°F). It is allowed to switch ON when the probe temperature reaches 3.5°C (40°F).