This manual covers the Electronic Automatic Temperature Control (EATC) system, a significant advancement in automotive comfort control developed by Ford Motor Company for its Mercury brand. The EATC system offered automated temperature and air distribution management, enhancing the driving experience in various Mercury models, including sedans, coupes, and SUVs, from the late 1980s through the 2000s. This system represented a move towards greater convenience and sophisticated climate management within the mid-to-upper market segment.

This comprehensive repair manual provides detailed, system-specific guidance for professional automotive technicians and advanced DIYers. It focuses on the diagnostics and repair of the EATC system, including its control module, various sensors, and actuators. The manual covers symptom-based troubleshooting, diagnostic trouble code interpretation, pinpoint tests, component replacement procedures, wiring diagrams, and actuator calibration. Its detailed approach to EATC system faults is designed to reduce diagnostic time and improve repair accuracy, making it an essential resource for addressing common issues such as actuator failure, sensor inaccuracies, and control module malfunctions.