VehiCROSS 4WD V6-3.5L (1999)
Refrigerant Pressure Sensor / Switch: Description and Operation
Dual Pressure Switch
Applicable to A/T equipped models
Triple pressure switch (1) is installed on the upper part of the receiver/dryer (2). This switch is constructed with a unitized type of two switches.
One of them is a low and high pressure switch (Dual pressure switch) to switch "ON" or "OFF" the magnetic clutch as a result of irregularly
high-pressure or low pressure of the refrigerant.
The other one is a medium pressure switch (Cycling switch) to switch "ON" or "OFF" the condenser fan sensing the condenser high side pressure.
To prevent compressor damage, the triple pressure switch will open if system pressure is too low or too high:
176.5 ± 19.6 kpa (156.4 ± 17.7 psi.)
or above 2942 ± 196.1 kpa (426.6 ± 28.4 psi).
The medium pressure switch will close when system pressure exceeds:
1471 ± 98.1 kPa (213.3 ± 14.2 psi), turning on the condenser fan.
