Dual-Zone Electronic Automatic Temperature Control (EATC): Notes
WARNING: This page is about a different car, the 2008 Mercury Sable, 2008 Ford Taurus X, and 2008 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
The HVAC 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 HVAC module determines the correct conditions for the following outputs:
- A/C compressor operation
- Blower speed
- RH and LH temperature blend door positions
- Defrost/panel/floor airflow mode door position
- Air inlet door position