Volvo 780 Owner's Manual page 27

Volvo 1990 780 Model
Select the desired temperature
The fan will run at its maximum speed in either the max cooling or max heating positions.
Optimum defrosting
Set the function dial to
The air conditioning light will go on, even if the button is not depressed, to indicate that the air
conditioning system is also activated to dehumidify the air.
When the windows have cleared, set the fan control to position 2.
NOTE:
The air conditioning compressor only engages at temperatures above 41° F (5° C).
Always keep the air intake grille at the base of the windshield free of snow.
Operating Tips
*When the outside air is contaminated with exhaust gases, smoke etc. (as when driving through a
tunnel), push the recirculation button
compartment from outside. However, do not leave the system in this mode for more than 10-15 minutes,
since the air inside the car will become stale and the windows may fog.
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.
. In this position, very little air is drawn into the passenger