RL V6-3474cc 3.5L (1998)
Refrigerant Pressure Sensor / Switch: Description and Operation
The A/C pressure switch consists of a High-Low pressure switch (A/C pressure switch A) and a Middle pressure switch (A/C pressure switch B).
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High-Low pressure switch
If the refrigerant pressure becomes too high (due to blockage), or too low (due to leakage), the A/C pressure switch sends a signal to the fan
control unit to prevent the compressor from operating.
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Middle pressure switch
If the refrigerant pressure goes above or below 1,520 kPa (15.5 kg/sq.cm, 220 psi), the A/C pressure switch sends a signal to the fan control unit
to change the speed of the condenser fan and radiator fan (High-Low).
