HEATING AND AIR CONDITIONING
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 ve
-
hicle must be driven under these con-
ditions, 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.
NOTE
Keep the engine exhaust system and
the vehicles cab ventilation system
properly maintained. It is recom
-
mended that the vehicles exhaust
system and cab be inspected:
• By a competent technician every
15,000 miles,
• Whenever a
change is noticed in
the sound of the exhaust system,
• Whenever the
exhaust system,
underbody, or cab is damaged.
NOTE
To allow for proper operation of the ve-
hicle ventilation system, keep the in-
let grille at the base of the windshield
clear of snow, ice, leaves and other ob
-
structions at all times.
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
When idling for short periods of time:
• Set the
heating or cooling system
to Heat or A/C
• Set the
fan to Medium or High
speed
• Set the
controls to FRESH AIR
3
(04/13) Y53-6047–2C 3-81
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