operators_manual

WARNING
DO NOT drive with visibility reduced
by fog, condensation, or frost on the
windshield. Your view may be ob-
scured, which may result in death, per-
sonal injury, equipment or property
damage. For clear visibility and safe
driving it is extremely important for you
to follow the instructions pertaining to
the function and use of the ventilation/
heating and defogging/defrosting sys-
tem. If in doubt, consult your dealer.
Maximum heating output and fast de-
frosting can be obtained only after the
engine has reached operating temper-
ature.
WARNING
Exhaust fumes from the engine con-
tain carbon monoxide, a colorless and
odorless gas. DO NOT breathe the en-
gine exhaust gas. A poorly maintained,
damaged or corroded exhaust system
can allow carbon monoxide to enter
the cab. Entry of carbon monoxide into
the cab is also possible from other ve-
hicles nearby. Failure to properly main-
tain your vehicle could cause carbon
monoxide to enter the cab, resulting in
death or personal injury.
WARNING
Never idle your vehicle for prolonged
periods of time if you sense that ex-
haust fumes are entering the cab. In-
vestigate the cause of the fumes and
correct it as soon as possible. If the
vehicle must be driven under these
conditions, drive only with the windows
open. Failure to repair the source of
the exhaust fumes may result in death,
personal injury, equipment or property
damage.
CAUTION
Do not stay in the vehicle with the en-
gine running or idling for more than 10
minutes with the vehicle's Heater and
A/C ventilation system in RECIRC or
at LOW FAN SPEED. Even with the
ventilation system on, running the en-
gine while parked or stopped for pro-
longed periods of time is not recom-
mended.
NOTE
Keep the engine exhaust system and
the vehicle's cab ventilation system
properly maintained. It is recommend-
ed that the vehicle's exhaust system
and cab be inspected (1) By a compe-
tent technician every 15,000 miles
(24,000 km) (2) Whenever a change is
noticed in the sound of the exhaust
system (3) Whenever the exhaust sys-
tem, underbody, or cab is damaged.
NOTE
If you are required to idle your vehicle
for long periods of time, install an aux-
iliary heater or automatic idle control.
These auxiliary devices can reduce
fuel consumption and save you mon-
ey.
CONTROLS - Heating and Air Conditioning
Y53-6126-1A1 (01/21) 115
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