Description and operating principle of controls (Focus 1)

Cars without air conditioning

Cars without air conditioning have a standard control panel with three knobs.

The air recirculation mode is activated by a two-position switch (on-off), which controls the actuator (DC motor).

Cars with manual air conditioning

The control panel on vehicles with air conditioning differs from the control panel on vehicles without air conditioning only in that there is an additional two-position (on-off) switch for the A/C system.

Air distribution and temperature control - vehicles without Electronic Automatic Air Temperature Control (EATC)

The air distribution and temperature control flaps are mechanically driven using cables.

Vehicles with Electronic Automatic Temperature Control (EATC)

Vehicles with EATC have a control panel that has several switches. Two switches for setting the interior temperature, two switches for controlling the fan, four switches for controlling the air flow, and one on-off switch each for A/C and air recirculation mode. In addition, the on-off switch for EATC and the operating switches for the windshield heater and rear window heater are located on the EATC control panel. The EATC control module is integrated with the control panel. Unlike the manual A/C system, EATC has a self-diagnosis function.

The air recirculation mode is activated by a two-position switch (on-off), which controls the actuator (DC motor).

Air distribution and temperature control - vehicles with Electronic Automatic Air Temperature Control (EATC)

The air distribution and temperature control flaps are controlled by the EATC control module and are actuated by actuators (stepper motors).

Pos.	Spare Part No	Name
1	-	Actuator - Temperature Control
2	-	Actuator - Central Ventilation Deflector/Footwell Deflector
3	-	Actuator - anti-icing deflector

Monitoring the temperature in the cabin

The EATC control module monitors the interior temperature using a sensor system consisting of four sensors. Two sensors in the heater housing to monitor the outlet temperature, one sensor in the EATC control panel to monitor the interior temperature and one solar radiation sensor in the instrument panel trim to monitor the intensity of sunlight entering the vehicle. In addition, the EATC control module receives information about the current outside temperature from the trip computer. On vehicles with a Duratec - ST engine, the EATC control unit receives information about the current outside temperature via the SCP bus.

Changing temperature units in the EATC display

With EATC on, pressing the FAN and RECIRCULATION buttons simultaneously for at least 2 seconds causes the display to switch from Celsius to Fahrenheit.