Ford Mercury Villager 1997 Owner's Manual page 68

NOTE: The A/C button independently toggles the A/C system's
compressor signal and indicator light ON and OFF in
the Panel, Panel/Floor, Floor, Defrost and Mix functions.
The A/C button will not operate or light when the
system is set in the OFF position. The A/C button will
operate in defrost but will not override previously
discussed automatic operation.
Cooling your vehicle with outside air
Cooling your vehicle with air conditioned outside air is quieter
but less economical than using recirculated air. It also has less
cooling capacity.
To cool your vehicle using outside air:
1. Turn the air intake selector button off (the outside air
position). The air conditioning unit directs outside air through
the instrument panel registers.
2. Press one of the function selector buttons.
3. Press the A/C button. The indicator light on the A/C button
will illuminate.
4. Turn the temperature control knob to COOL.
5. Turn the fan speed knob to the position of your choice.
6. Make sure the registers in the instrument panel are open.
During periods of high humidity, vapor may be emitted from the
air outlets when using the A/C with outside air. Correct this
by switching to recirculated air with the A/C button.
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