Section 84 (HVAC System - Automatic): Description
WARNING: This page is about a different car, the 1996 Mercury Grand Marquis and 1996 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
The automatic A/C-heater system consists of an Electronic Automatic Temperature Control (EATC) module, ambient temperature sensor, sunload sensor, and in-vehicle temperature sensor. The controlled components include a Pulse Width Modulated (PWM) blower speed controller, 3 vacuum-actuated air control doors, and an electrically operated temperature blend door.
Compressor clutch operation is controlled by high and low pressure cut-out switches and an A/C cut-out relay with inputs from the PCM.