Dual-Zone Electronic Automatic Temperature Control
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
The dual-zone electronic automatic temperature control (EATC) module analyzes input from the following major sources:
- temperature, airflow direction, blower, A/C and RECIRC selection (made by the vehicle occupants)
- in-vehicle temperature sensor
- ambient temperature sensor
- solar radiation sensor
- vehicle speed
- engine coolant temperature
Using these inputs, the dual-zone EATC module determines the correct conditions for the following outputs:
- A/C compressor operation
- blower speed
- temperature blend door position
- defrost/panel/floor door position
- air inlet door position