Peterbilt Medium Duty Trucks Operator's Manual after 1-07
Peterbilt Medium Duty Trucks Operator's Manual after 1-07
Peterbilt Medium Duty Trucks Operator's Manual after 1-07
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Heater and Air Conditioner<br />
HEATER AND AIR CONDITIONER<br />
Introduction<br />
The combination heater-air conditioner provides comfort for<br />
those in the cab through accurate control of the cab environment<br />
in all weather conditions. Regular attention to the items<br />
below will help you keep the heater-air conditioner unit running<br />
well.<br />
Special Precautions<br />
WARNING! Excessive heat may cause the pressurized<br />
components of the air conditioning system<br />
to explode. Never weld, solder, steam clean,<br />
or use a blow torch near any part of the air conditioning<br />
system.<br />
• If a refrigerant leak develops in the presence of<br />
excessive heat or an open flame, hazardous gases<br />
may be generated. These gases may cause unconsciousness<br />
or death. If you become aware of a refrigerant<br />
leak on your vehicle have your system service<br />
immediately and observe the following precautions:<br />
Heater<br />
Preventive Maintenance<br />
– Stay away from the hot engine until the exhaust<br />
manifold has cooled.<br />
– Do not permit any open flame in the area. Even a<br />
match or a cigarette lighter may generate a hazardous<br />
quantity of poisonous gas.<br />
– Do not smoke in the area. Inhaling gaseous<br />
refrigerant through a cigarette may cause violent<br />
illness.<br />
• Check all heater controls for full-range operation.<br />
• Check hoses, connections, and heater core for condition<br />
and leaks.<br />
• Check the drain pan of the fresh air vent for trapped<br />
water before assuming that there is a leak in the heating<br />
system. If the heater core is leaking, a reliable radiator<br />
shop should be able to repair it.<br />
• Check the heater core for debris blocking the air flow. If<br />
the blower and air controls are functioning properly, yet<br />
the heater is not operating properly, the heater core or<br />
the hot water valves may be clogged or closed. Clean<br />
the heater core if necessary. If the condition persists,<br />
take the vehicle to a <strong>Peterbilt</strong> Dealer for proper heater<br />
service or repair.<br />
– 180 – Y53-6008 <strong>Medium</strong> <strong>Duty</strong> (R10/06)