Forester F4-2.5L SOHC (2004)
Refrigerant Pressure Sensor / Switch: Description and Operation
PRESSURE SWITCH
The pressure switch is a high-pressure side component of the refrigeration cycle (cooling cycle). It consists of a diaphragm that receives refrigerant gas
pressure, a snap plate, a rod, and contacts that open both when the gas pressure is too low and when it is too high.
The pressure switch plays the following roles:
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Preventing "no-gas" operation due to leakage (when gas pressure is too low)
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Protecting the cooling system against abnormally high refrigerant pressure (when gas pressure is too high)
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Detection of compressor load (mid pressure contact: electric cooling fan output control)
ON-OFF PRESSURES
