Aftermarket A/C Trinary switches combine low and high-pressure compressor clutch cut-off functions plus an electric fan engagement signal at 254 psi. The low-pressure cut-off of these trinary switches is 30 psi and the high-pressure cut-off is 406 psi. Perfect usage when running electric fans.


Safety Switch Pressures:

LOW is OFF @ 28PSIG – ON @ 30PSIG

HIGH is OFF @ 380PSIG  ON @ 369PSIG

Fan engagement Pressures:

HIGH is OFF @ < 250PSIG – ON @ 255PSI.