HEATER AND AIR CONDITIONER generated. If you become aware of a refrigerant leak on your vehicle have your system serviced immediately and observe the following precautions: Heater Air Conditioner Check all heater controls for full-range operation. WARNING! Check hoses, connections, and heater core for condition and leaks. The air conditioning system is under pressure. If not handled properly during servicing, it could explode. Any servicing that requires depres- surizing and recharging the air con- ditioning system must be conducted by a qualified technician with the right facilities to do the job. Failure to comply may result in death, per- sonal injury, equipment or property damage.
Stay away from the hot engine until the exhaust manifold has cooled. Do not permit any open flame in the area. Even a match or a cigarette lighter may generate a hazardous quantity of poisonous gas. CAUTION During extreme cold weather, do not blow hot defroster air onto cold wind- shields. This could crack the glass. Turn the air direction lever to Defrost and adjust the fan speed accordingly while the engine warms. If the en- gine is already warm, move the tem- perature selector to Cool, then grad- ually increase the temperature when you see that the windshield is start- ing to warm-up. Do not smoke in the area. Inhaling gaseous refrigerant through a cigarette may cause violent illness.
Listen to the compressor and drive clutch for noise and vibration. If you find problems, have the system checked thoroughly. A malfunctioning clutch usually indicates trouble elsewhere in the system. 5 Check the evaporator core, filter, and condenser core for debris restricting air flow. Clean if (03/17) Y53-6077-1B1 5-121