Electronic Automatic Temperature Control (EATC) Module
WARNING: This page is about a different car, the 2004 Mercury Mountaineer and 2004 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
The EATC module is on the CAN communication network. The EATC module controls automatic climate functions that maintain the vehicle interior temperature at a constant setting. For additional information, refer to CLIMATE CONTROL SYSTEM