Defogging And Defrosting - Pontiac 2002 Montana Owner's Manual

When the air conditioner compressor is on, you may
sometimes notice slight changes in your vehicle's engine
performance and power. This is normal. The system is
designed to help fuel economy while it maintains the
desired cooling level.
The air conditioner removes moisture from the air, so
you may sometimes notice water dripping from under
your vehicle's engine compartment when it is idling or
after it has been turned off. This is normal.
Heating
Turn the temperature knob clockwise toward the red
area to warm the air.
In the floor mode, outside air will be brought in and sent
through the floor outlets. The heater works best if you
keep your windows closed while using it.
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The bi level setting is designed for use on sunny days
when the air is only moderately warm or cool. On days
like these, the sun may adequately warm your upper
body, but your lower body may not be warm enough.
For the best results, turn the temperature knob to the
middle position, and then adjust it for comfort.
3-4
Your vehicle has a computer controlled transaxle
designed to warm up the engine faster when the outside
temperature is 35 _ F (2 _ C) or colder. You may notice
that the transaxle will shift at a higher vehicle speed
until the engine is warmed up. This is a normal
condition designed to provide heat to the passenger
compartment and defrost the windows more quickly.
If you have the optional engine coolant heater and use it
during cold weather, 0 _ F (
heating system will provide heat more quickly because
the engine coolant is already warmed. See "Engine
Coolant Heater" in the Index.

Defogging and Defrosting

To rapidly defrost the windshield, turn the temperature
knob all the way clockwise to the red area and turn
the mode knob to defrost. Adjust the fan to the
highest speed.
To keep the windshield clear and bring in heated air
through the floor ducts, turn the mode knob to defog.
When the temperature outside is above freezing, the air
conditioner compressor will run in these settings to help
remove moisture from the air.
18 _ C) or lower, your
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