HEATER AND AIR CONDITIONER HEATER AND AIR CONDITIONER Whenever the exhaust system, underbody or cab is damaged Special Precautions WARNING! Introduction To allow for proper operation of the vehicle ventilation system, proceed as follows: 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 conditioning system. Failure to com- ply may result in death, personal in- jury, equipment or property damage. 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 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. WARNING! 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: Air conditioning refrigerant can be hazardous to your health.
Do not expose yourself to leaking refriger- ant for prolonged periods near ex- cessive heat, open flames, or with- out proper ventilation. Failure to do so may result in death or personal in- jury. 5 Check the drain tube of the fresh air inlet for trapped water before assuming that there is a leak in the heating system. Inspected by a competent technician every 15,000 miles Whenever a change is noticed in the sound of the exhaust system If a refrigerant leak develops in the presence of excessive heat or an open flame, hazardous gases may be 5-120 Y53-6077-1B1 (03/17)