Chevrolet Malibu 2007 Owner's Manual page 195

If you select recirculation while in defrost, defog or
floor, the light on the button will flash three times
and go out to let you know this is not allowed.
This is to prevent window fogging.
When the weather is cool or damp, operating the
system in recirculation for extended periods of
time may cause fogging of the vehicle's windows.
To clear the fog, select either defog or defrost.
Make sure the air conditioning is on. You will want
to allow the air conditioning to run automatically
to help dehumidify the air.
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(Temperature Control): Press the up
and down arrows to increase or decrease the
temperature inside the vehicle.
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(Air Conditioning): Press this button to
turn the air conditioning compressor on and off.
A light above the button will illuminate when the
air conditioning is on.
When air conditioning is selected or in AUTO
mode, the system will run the air conditioning
automatically to cool and dehumidify the air
entering the vehicle.
On hot days, open the windows to let hot inside
air escape; then close them. This helps to reduce
the time it takes for your vehicle to cool down.
It also helps the system to operate more efficiently.
On cool, but sunny days while using manual
operation of the automatic system, use bi-level to
deliver warm air to the floor and cooler air to
the instrument panel outlets. To warm or cool the
air delivered, press the temperature buttons to
the desired setting.
In AUTO mode the system will cool and dehumidify
the air inside the vehicle. Also while in AUTO
mode, the system will maximize its performance
by using recirculation as necessary.
On cold days when using manual operation of the
automatic system, choose floor mode to deliver
air to the floor outlets. To warm or cool the
air delivered, push the temperature buttons to
the desired setting.
If you want to use the automatic mode, turn the
knob to AUTO and adjust the temperature by
pressing the temperature buttons.
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