A/C Compressor Control Module

The A/C compressor control module is mounted to evaporator case. Compressor control module controls operation of A/C compressor clutch in response to signals received from dual-pressure switch, evaporator temperature sensor and Powertrain Control Module (PCM). When A/C system is operating, the compressor control module engages the compressor clutch upon demand and when conditions are favorable. The PCM de-energizes the clutch when system pressure is high or low, evaporator temperature signal is low, or engine demand is high. An idle-up signal is sent to PCM, to prevent engine stalling when A/C system is on.