Chevrolet 1979 Light Duty Truck Owner's Manual page 57

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For adequate rear seat heating, the area beneath the front seat
must not be blocked by carpeting, rags, paper or other material
and fan should operate on high blower.
For better driver vision, clear the windshield, rear window,
•
outside mirrors and all side windows of ice and snow before
driving.
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Run the blower on "High" for a few moments before driving off.
This helps clear the intake ducts of snow and further lessens the
chance of fogging on the inside of the windshield.
AIR CONDITI ONING SYSTEM - FOUR
SEASON
During some A/C operation conditions, slight increases and decreases
of engine speed/power may be noticed. This characteristic should be
considered normal, as the system is designed to cycle the compressor
"on and off' to maintain desired cooling. The reduced compressor
operation should benefit fuel economy.
Operating instructions for your Four Season Air Conditioner are as
follows:
•
•
LO
FAN
Fan
The fan lever has four (4) positions from
the top. When the air conditioning system is Off, low blower will be
maintained regardless of fan switch position.
Temperature Selector-Lower Lever
The temperature lever allows a selection of air temperature from
at the far left to
Operation Selector-U pper Lever
This lever provides a selection of systems available to handle various
heating and cooling requirements throughout the year. The "Air
Conditioning" and "Heating" groups have several positions which
improve the effectiveness of the system for various demands.
•
Off -The system operates on low blower regardless of fan switch
position with air discharged into vehicle through heater outlet.
•
Max A/C
through the system (with some outside air) and discharged from
the A/C outlets. The fan speed may be selected as desired in the
MAX
position.
r-AIR CONO---, r ECONOMY,
OFF MAX NORM BI·LEVEL VENT HEATER OEF
•
•
Hot
at the far right.
-Air from the passenger compartment is recirculated
• • •
Lo
at the bottom to
2-27
•
Hi
at
Cold