Volvo VNL 780 Operator's Manual page 127

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Mist and Ice Removal
DANGER
DO NOT attempt to drive with the
windshield covered by mist, or fog or
frost. The visibility is reduced, which
could lead to an accident causing severe
personal injury or death.
1
Turn knob to defrost.
2
Rotate the temperature knob to add heat as necessary.
3
Set the fan speed knob to maximum (the extreme right).
Use these instructions to keep the windshield clear at all times. Maximum heat output for
fast defrosting can only happen after the engine has reached operating temperature. While
driving in extreme cold, adding heat to the windshield may change drifting snow to ice, in
this case, setting the air distribution to floor and/or panel only may allow the drifting snow
to be brushed off by the windshield wiper. Clean the inside of the window using normal
window cleaner in order to minimize the risk of misting. Clean more often if a passenger
smokes in the cab.
INSTRUMENTS AND CONTROLS
117

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