RAM 2500 Van V8-5.2L CNG VIN T (1999)
Fin Sensing Cycling Clutch Switch: Specifications
When the fin sensing cycling clutch switch sees a temperature input below about 1.6° C (35° F), it signals the PCM to cycle the compressor OFF.
When the temperature input reaches above about 3.9° C (39° F), the switch signals the PCM to cycle the compressor back ON.