Cooling Fan Pressure Switch

High Pressure And Safety Switch
This switch has three functions:
- It shuts off the compressor if pressure in the system rises too high, more than approx. 30 bar (435 psi).
- It shuts off the compressor if pressure gets too low, less than approx. 2 bar (29 psi).
- It sends a signal to the engine management system to start the radiator fan. If the pressure is over approx. 16.5 bar (239 psi), one of the pressure switches closes and the radiator fan runs until the road speed is over approx. 65 km/h (40 mph). This cools the condenser more effectively and maintains the A/C system performance.