RAM 2500 Van V8-5.9L VIN Z (1997)
Evaporator Temperature Sensor / Switch: Description and Operation
Fig 22 Fin Sensing Cycling Clutch Switch
Fig 4 Fin Sensing Cycling Clutch Switch
FIN SENSING CYCLING CLUTCH SWITCH
The fin sensing cycling clutch switch uses a thermistor probe, in a capillary tube inserted into the front evaporator coil fins, to monitor evaporator
temperature. It signals the Powertrain Control Module to cycle the compressor clutch on and off to control the evaporator temperature. Controlling
evaporator temperature prevents condensate water on the evaporator fins from freezing and obstructing air conditioning system air flow.
The fin sensing cycling clutch switch is a sealed unit and cannot be adjusted or repaired. If faulty or damaged, the switch must be replaced.
