We offer a service to rebuild and repair the electronic automatic temperature control (EATC) on 1996 and newer Ford Crown Victoria, F-150, F-250, F-350, Explorer, Expedition, and Excursion vehicles. This rebuild corrects a common issue with the EATC that causes air to blow out of the wrong vents and/or the defrost.ttp://circuitboardmedics.com/ford-ea... Circuit Board Medics shows how to initiate a diagnostic self-test of the Ford, Lincoln, and Mercury EATC modules. This procedure will help troubleshoot a faulty EATC or blend valve for the climate control system.