A/C Compressor Control Relay
WARNING: This page is about a different car, the 2001 Pontiac Sunfire, 2001 Chevrolet Cavalier, 2000 Pontiac Sunfire, and 2000 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
Powertrain Control Module (PCM) energizes A/C compressor control relay for compressor operation. A/C compressor control relay disengages A/C compressor clutch momentarily (about 3 seconds) during start-up on a warm engine.