A-312756087-AI Sub To 220-210One New Aftermarket Replacement A C High Pressure Switch Fits Case International Harvester, White, Fits Allis Chalmers, and Steiger Agricultural Equipment This aftermarket replacement air conditioning high pressure switch mounts on the A C compressor and protects the system by cutting out the compressor clutch when refrigerant pressure exceeds safe limits. The switch is a 2 wire, normally open design that opens at approximately 300 PSI and closes at