Defogging And Defrosting - Chevrolet Colorado 2005 Owner's Manual

Mode Buttons
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(Recirculation): If your vehicle has air
conditioning, you will have the recirculation feature. This
mode recirculates air inside the cabin, and prevents
outside air from coming in the vehicle. It can be used to
prevent outside odors from entering your vehicle and
cool the air inside your vehicle more quickly. Press this
button to turn the recirculation mode on or off. An
indicator light on the button will come on to let you know
the recirculation mode is activated.
Recirculation is available only in the bi-level and vent
modes. If you push the recirculation button in any other
mode, the light will not come on.
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(Air Conditioning): Your vehicle may have air
conditioning. Press this button to turn the air-conditioning
system on or off. An indicator light on the button will
come on to let you know the air conditioning is activated.
When the system is on, this setting cools and
dehumidifies the air entering your vehicle.
The air conditioning will not function if the fan is
turned off.
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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.
The air conditioning system removes moisture from the
air, so you may sometimes notice a small amount of
water dripping underneath your vehicle while idling
or after turning off the engine. This is normal.

Defogging and Defrosting

Fog on the inside of windows is a result of high humidity
(moisture) condensing on the cool window glass. This
can be minimized if the climate control system is
used properly. There are two modes to clear fog or
frost from your windshield and side windows. Use the
defog mode to clear the windows of fog or moisture
and warm the passengers. Use the defrost mode
to remove fog or frost from the windshield more quickly.
For best results, clear all snow and ice from the
windshield before defrosting.