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V90 L6-2.9L VIN 96 B6304S (1998)

Sensors and Switches > Sensors and Switches - HVAC > Refrigerant Pressure Sensor / Switch, HVAC > Low Pressure Sensor / Switch, HVAC > Component Information > Description and Operation

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Low Pressure Sensor / Switch: Description and Operation

Low-Pressure Switch (Pressostat)

The low-pressure switch senses the refrigerant pressure afier the evaporator i.e. in the low-pressure circuit. The A/C compressor is switched out if the
pressure becomes too low (under approx. 1.6 bar/45 psi) and is restarted when the pressure increases again (to over 3.1 bar/23 psi).

Without compressor switch-out, the evaporator would become so cold that the condensate on the unit would freeze.

Sensors and Switches > Sensors and Switches - HVAC > Refrigerant Pressure Sensor / Switch, HVAC > Low Pressure Sensor / Switch, HVAC > Component Information > Description and Operation

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