Fin Sensed Cycling Clutch Switch

Fin Sensed Cycling Clutch Switch:

DESCRIPTION
The Fin-Sensed Cycling Clutch Switch (FCCS) is located in the heater A/C unit housing at the blower motor. The FCSS prevents evaporation freeze-up by signaling the Engine Controller to cycle the compressor ON and OFF by monitoring the temperature of the suction line.

OPERATION
The FCCS uses a thermistor probe in a capillary tube, inserted into a capillary tube well on the suction line. The well must be filled with conductive grease to prevent corrosion and allow thermal transfer to the probe. The FCCS is a sealed unit and cannot be adjusted or repaired, it must be replaced if found defective.