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First Edition for Buick LeSabre Owner’s Manual – 1999

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On sunny days, when the air is moderately warm or
cool, use BI

-

LEV to deliver warm air to the floor and

cooler air to the middle instrument panel outlets. On
days like these, the sun may adequately warm your
upper body, but your lower body may not be warm
enough. To warm or cool the air delivered, adjust the
TEMPERATURE lever.

The amount of fresh air entering the vehicle is limited
when RECIRC is selected. This is helpful when you are
trying to cool the air in your vehicle or limit the air
entering the vehicle.

If your vehicle has the Dual Automatic Comfortemp
system and it is set for AUTO, on very hot days, the
system will automatically enter the RECIRC mode and
the temperature door will be positioned at the full cold
position for maximum cooling. If the system is not in
the AUTO mode, RECIRC should be selected to provide
maximum cooling. You can choose the extreme comfort
setting of 60

_

F (16

_

C), but the system will not cool any

faster by choosing the extreme comfort setting.

When the air conditioner is on, you may sometimes
notice slight changes in your vehicle’s engine speed and
power. This is normal because the system is designed to
cycle the compressor on and off to keep the 
desired temperature.

Heating

If your vehicle has the electronic touch system, on 
cold days, use HTR with the TEMPERATURE lever
toward WARM.

If your vehicle has the Dual Automatic Comfortemp
system, and on cold days, if the AUTO mode is selected,
the system will automatically direct the air toward the
floor and the temperature door will be positioned at the
full hot position. You can choose the extreme comfort
setting of 90

_

F (32

_

C) but the system will not warm up

any faster by selecting the extreme comfort setting. If
the outside temperature is cold, the fan will be delayed
to avoid blowing cold air. Pushing the FAN, AIR FLOW
or FRONT buttons will override this delay, turn off the
AUTO mode and change the fan speed.

With each system, outside air will be brought in and sent
through the floor outlets. The heater works best if you
keep your windows closed while using it.