Chevrolet corvette 2002 ユーザーズマニュアル

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A Typical Cold Weather Example:
Your vehicle has been parked outside overnight in 
cold weather (below 32
_F/ 0_C) and you have set the 
driver temperature at 73
_F (23_C) and have selected 
the AUTO mode. The system will automatically adjust
the temperature output to maximum heating. The fan
will start at a low speed. This is to avoid blowing cold
air into the vehicle. The length of the delay depends on
the amount of time since the engine was last started, the
outside temperature and the engine coolant temperature.
As the coolant warms up, the fan speed will gradually
increase. Air will flow to the floor with some air to 
the windshield to prevent fogging under most 
normal conditions.
As the interior of the vehicle warms up to the set
temperature, the fan speed will decrease and the
temperature output may become cooler. If the interior
temperature continues to warm up due to heating from
the sun or outside temperature increases, the system 
may switch to other air delivery modes (typically defog
or bi
-
level).
A Typical Hot Weather Example:
The vehicle has been parked outside all day in hot
weather (above 80
_F/ 27_C) and you have set the 
driver temperature at 73
_F (23_C) and have selected the
AUTO mode. The system will automatically adjust the
temperature output to maximum cooling. The fan will
start at a low speed momentarily to push the hot air to
the floor of the vehicle and then go to a higher fan speed
with cold airflow out of the instrument panel outlets. 
A small amount of airflow will continue through the
lower ducts to cool the floor area.
The air intake may start in the recirculated mode for
maximum cooling performance. As the interior of the
vehicle cools down to the set temperature, the fan speed
will decrease and the temperature output may become
warmer. The air intake may shift from recirculation to
outside air mode. If the interior continues to cool due to a
decrease in the amount of heat the vehicle is absorbing
from the sun or a decrease in the outside temperature, the
system could switch to other air delivery modes (typically
bi
-
level or defog).