HEATER AND AIR CONDITIONER
HEATER AND AIR
CONDITIONER
Introduction
The combination heater-air conditioner
provides comfort for those in the cab
through accurate control of the cab
environment in all weather conditions.
Regular attention to the items below
will help you keep the heater-air
conditioner unit running well.
Keep the
vehicle's ventilation system,
engine exhaust system and cab
joints properly maintained. It is
recommended that the vehicle's
exhaust system and cab be serviced
as follows:
• Inspected by a competent
technician every 15,000 miles
• Whenever a change is noticed in
the sound of the exhaust system
(04/13)
• Whenever the exhaust system,
underbody or cab is damaged
To
allow for proper operation of the
vehicle ventilation system, proceed as
follows:
• Keep the inlet grille at the base of
the windshield clear of snow, ice,
leaves and other obstructions at
all times.
• Keep the exhaust pipe area clear
to help reduce the buildup of
exhaust gas under the vehicle.
• Check the drain tube of the fresh
air inlet for trapped water before
assuming that there is a leak in the
heating system.
Y53-6047–2C
Special Precautions
WARNING!
Excessive heat may cause the pres-
surized components of the air con-
ditioning system to explode. Never
weld, solder, steam clean, or use a
blow torch near any part of the air con
-
ditioning system. Failure to comply
may result in death, personal injury,
equipment or property damage.
Air conditioning refrigerant can be haz-
ardous to your health. Do not expose
yourself to leaking refrigerant for pro
-
longed periods near excessive heat,
open ames, or without proper venti
-
lation. Failure to do so may result in
death or personal injury.
WARNING!
If a refrigerant leak develops in the
presence of excessive heat or an
open ame, hazardous gases may be
generated. If you become aware of a
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