The electrical switch is designed to give feedback to the engine management system. The ECM controls the A/C system on modern vehicles. In earlier vehicles, they are used to directly turn the compressor off to avoid compressor failure.
gpd Switch 1711485
1-800-Radiator SW49, 1-800-Radiator SW-49, Four Seasons 37300, NAPA Temp 203700, Saab 4071965, Saab 40-71-965, UAC SW11091, UAC SW4082C