Ford Mercury Villager 1997 Owner's Manual page 73

Controls and Features
if you choose to manually override the airflow location by
selecting one of the function selector buttons, you will also need
to select the A/C button if you desire cool air-conditioned air.
(Your ATC automatically operates the air conditioning [if required]
when you are in the AUTOMATIC mode without illuminating
the A/C button, but the system requires you to manually select the
A/C button if you desire A/C operation when you manually
override airflow location.)
If you want continuous maximum cooling, push the side of
the TEMP button until 60° F (16° C) shows in the display window.
The ATC will cool at its maximum level and disregard the
60° F (16° C) setting until a warmer temperature is selected. If
you want continuous maximum heating, push the side of the
TEMP button until 90° F (32° C) shows in the display window.
The ATC will provide maximum heat regardless of the 90° F (32° C)
setting until a cooler temperature is selected.
The display window and the function selector buttons indicate
how the system is operating. The display window shows the
selected temperature and displays AUTO if you are operating
in the AUTOMATIC mode. If you override the automatic mode by
selecting any of the function selector buttons, AUTO no longer
appears in the display window and the appropriate function
selector button(s) illuminate. The display window also
indicates manual (thumbwheel) control of the fan speed when a
is shown.
Automatic Operation
Push the AUTOMATIC button and select the desired
temperature. The selected temperature and AUTO appear in the
display window. The ATC heats or cools to achieve the set
temperature. It is important to note that if the ATC engages your
vehicle's air-conditioning, it will do so automatically without
illuminating the A/C button.
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