Ford 1997 Crown Victoria Manual page 78

When in AUTOMATIC and weather conditions
require heat, air will be sent to the floor. But, a
feature is included in your EATC to prevent
blowing cold air to the floor if the engine
coolant is not warm enough to allow heating.
For a short time the fan will be at low speed
and air directed to the windshield. In 3-1/2
minutes or less, the fan speed will start to
increase and the airflow will change to the floor
area.
If unusual conditions exist (i.e., window fogging,
etc.), the six manual override buttons allow you
to select special air discharge locations. A
thumbwheel allows you to adjust the fan speed
to suit your needs.
Temperature selection
The RED and BLUE buttons at the upper left of
the Control are for temperature selection. The
RED button will increase the set temperature
and the BLUE button will lower the set
temperature. Pressing a button and releasing it
will change the set temperature one degree.
Holding either button in will rapidly change the
temperature setting in one degree increments to
either 65˚F (18˚C) (BLUE) or 85˚F (29˚C)(RED).
Then, the set temperature will jump 5˚ and stop
at either 60˚F (16˚C) which is maximum cooling
or 90˚F (32˚C) which is maximum heating.
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