Chevrolet 2003 Corvette Owner's Manual page 140

There is also an inside temperature sensor located to
the left of the ignition switch. The automatic climate
control system uses this sensor to receive information,
so if you block or cover it, the system will not function
properly.
Defogging and Defrosting
There are two modes to clear fog or frost from your
windshield. Use the defog mode to clear the windows of
fog or moisture and warm the passengers. Use
FRONT to remove fog or frost from the windshield more
quickly.
Press the MODE button until the defog mode appears
on the display.
+3
(Defog): This mode directs the air equally between
the windshield and the floor outlets with a small
amount to the side window outlets. When you select this
mode, the system turns off recirculation and runs the
air-conditioning compressor unless the outside
temperature is at or below freezing. An indicator light in
the A/C button wiii come on io iei you know ihai iire
air-conditioning compressor is activated. The
recirculation mode cannot be selected while in the
defog mode.
FRONT: Pressing this button directs most of the
air to the windshieid, with a smaii amount aireciea io ihe
side window outlets. The light on the button will come
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 will automatically
turn off the recirculation and run the air-conditioning
compressor, unless the outside temperature is at
or below freezing. An indicator light in the A/C button
will come on to let you know that the air-conditioning
compressor is activated. Recirculation cannot be
selected while in the defrost mode. Pressing this button
again will return the system to the last operating
mode and the air intake mode will be in outside air.
If the system is in FRONT defrost when you shut the
engine off, it will restart in FRONT defrost unless
the engine is off for longer than 40 minutes. If the engine
is off longer than 40 minutes, the system will restart in
the operating mode that was set prior to FRONT defrost
and the air intake mode will be in outside air.
Rear Window Defogger
The rear window defogger uses a warming grid to
remove fog or frost from the rear window.
The rear window defogger will only work when the
engine is running.
rHfr
REAR: Press this button to turn the rear window
defogger on. Be sure to clear as much snow from
button will come on to let you know that the rear window
defogger is activated.
rear windo\i\i as possible. iildizaio; light in the
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