Send an inquiry for this item


    03-07650 Trinary Pressure Switch

    Female Trinary Switch


    Low Pressure High Pressure Fan Pressure
    Part Number Fitting Type Off On Off On Off Cross Ref Mfg Electrical Boot
    03-07650 Female 7/16″-20 Normally closed 15-30 210-250 300-350 35-60 200-230 71R7650 Red Dot 03-13037

    Click here to view our complete line of trinary pressure switches

    Your inquiry has been sent!
    Send An Inquiry
    Categories: , . Tag: .

    Product Description

    How a Trinary Switch Works

    • Prevents the compressor from operating of system charge is lost or ambient temperature is too low
    • Stops compressor if head pressure increases to unsafe levels
    • Automatically resets when pressure drops back to normal
    • A shutter/fan override switch keeps head pressure within normal range by opening shutters or operating engine fan to increase air flow across condenser when head pressure rises above set level.


    • Install trinary switch on liquid side of A/C system between condenser and expansion valve
    • Compatible with R-12 and R134a systems