Buick RIVIERA 1993 Manual page 123

To rid the system of stale air in warm weather, air will
come out of the floor outlets for a short time.
Fan Speed
Bi-Level
H
The speed of the blower fan is controlled automancally'
if you have the fan on AUTO.
However, if you want the blower fan to run at a lower
speed, push
v.
If you want to raise the
blower speed, push
A .
The blower speed will go
lower or higher with every
push of the button until
the lowest or highest
speed is reached.
This setting is designed for
use on sunny days where
the-air is only moderately
warm or cool. On days like
these, the sun may
adequately warm your
upper body, but your lower
body may not be warm
enough.
The Bi-level setting directs outside air into your vehicle
in two ways. Cool air is directed toward your upper
body through the front instrument panel outlets,
while
slightly warmed air is directed through the heater outlet
at your feet.
The air conditioner compressor operates in all Air
Conditioned positions, and the Defrost position when
the outside temperature is above 40
OF
(8 C)
121