Lincoln 1997 Town Car Owner's Manual page 62

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.
58
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.
The average temperature range used is between
68˚F (20˚C) and 78˚F (26˚C). Changing the
temperature setting by several degrees outside this
range or overriding to 60˚F (16˚C) or 90˚F (32˚C)
will not speed up the heating or cooling process.