Operation CHARM: Car repair manuals for everyone.

Low Pressure Sensor / Switch, HVAC

Low-pressure Switch (Pressostat):
Closes at
R12 3.2 bar (46 psi)
R134a 3.1 bar (45 psi)

Opens at
R12 1.8 bar (26 psi)
R134a 1.6 bar (23 psi)