Chevrolet 2011 Corvette Owner's Manual page 230

8-4 Climate Controls
1
(Defrost): This mode clears the
windows of fog or frost more quickly.
Air is directed to the windshield, with
a small amount directed to the side
window outlets. The indicator light
comes on and the digital display will
show the defrost mode symbol and
fan speed when the front defrost
mode is being used. In this mode,
the system automatically turns off
the recirculation and runs the air
conditioning compressor, unless the
outside temperature is at or below
freezing. Recirculation cannot be
selected while in the defrost mode.
1
Pressing again will return the
system to the last operating mode.
For severe ice conditions, turn the
driver's temperature knob to 32°C
(90°F) while in defrost mode.
Do not drive the vehicle until all the
windows are clear.
(Air Conditioning Off):
Press to turn the air conditioning
compressor off. Press AUTO to
return to automatic operation.
When in AUTO, the air conditioning
compressor comes on automatically,
as needed.
Air conditioning does not operate
at temperatures below about 2°C to
4°C (35°F to 40°F). In temperatures
above 4°C (40°F), the air
conditioning cannot be turned off
in defrost and defog, as it helps to
remove moisture from the vehicle.
It also helps to keep the windows
clear.
You may notice a slight change in
engine performance when the air
conditioning compressor shuts off
and turns on again. This is normal.
The system is designed to make
adjustments to help with fuel
economy while still maintaining the
selected temperature.
On hot days, open the windows to
let hot inside air escape; then close
them. This helps to reduce the time
it takes for the vehicle to cool down.
It also helps the system to operate
more efficiently.
For quick cool down on hot
days press the AUTO button and
adjust the temperature to a cool,
comfortable setting. To achieve
maximum cool down, do the
following:
H
1. Select mode.
?
2. Press .
3. Select the a/c on.
4. Select the coolest temperature.
5. Select the highest fan speed.