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.
