A/C Cycling Switch (ACCS)
WARNING: This page is about a different car, the 1996 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
Switch is mounted on a Schrader-valve on suction accumulator-drier. If low-side pressure decreases to about 24 psi (1.7 kg/cm2 ), switch opens, interrupting power to compressor clutch. When pressure increases to about 43.5 psi (3.06 kg/cm2 ), switch closes, providing power to compressor clutch.