Powertrain Control Module (PCM)
WARNING: This page is about a different car, the 1996 Ford Ranger and 1996 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The PCM monitors and regulates A/C system. EEC system, working through Wide Open Throttle (WOT) relay, disengages A/C clutch under the following conditions: immediately after start-up, wide open throttle, coolant temperature approaching overheating condition and engine idle RPM approaching stall speed.