Electronic Automatic Temperature Control: Notes
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
The 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 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