Opel Blazer Operation & Maintenance Instructions Manual page 23

OFF: This setting turns the system off. Some outside
air will still enter the vehicle whenever the vehicle is
moving forward.
MAX A/C (Recirculate): This setting provides
maximum cooling with the least amount of work.
MAX A/C recirculates much of the air inside your
vehicle so it cools quickly.
A/C: This setting cools the air entering your vehicle
and directs it through the indtrument panel outlets.
BI-LEVEL A/C: Air is delivered through
the heater floor outlets as well as the instrument
panel outlets.
VENT: This setting directs airflow through
the instrument panel outlets. The air conditioning
compressor is not working when VENT is selected.
HEAT: This setting directs warmed air through
the heater floor outlets and windshield defroster outlets.
BLEND: Airflow is divided equally between the
heater floor outlets and the windshiels defroster outlets.
DEFROST: This setting directs most air through the
windshield defroster outlets and some through the heater
outlets.
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