8. The air dam under the front of the vehicle is designed to force air to flow upward and through the radiator rather than travel underneath the vehicle. If this air dam is broken or damaged due to contact with a parking block or other object, the engine may overheat. Check the Air Dam if Overheating Occurs
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10. Figure 51–2 (a) A typical automotive air-conditioning service machine that is capable of handling both CFC-12 and HFC-134a systems. (b) HFC-134a systems use quick-disconnect fittings that are larger than those used for CFC-12 systems.
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19. Always wear safety glasses and protective gloves when servicing any automotive air-conditioning system. If refrigerant escapes, it can freeze skin or cause blindness if liquid refrigerant were to get into the eyes. Refrigerant Can Be Hazardous
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32. If the air-conditioning compressor is found to be damaged mechanically, many experts recommend that an additional filter be installed in the refrigerant line to trap any debris that may have gotten into the system. This additional filter will help prevent the new compressor from being harmed by the debris as it circulates through the system. An Additional Filter is Insurance
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36. Whenever an evaporator is being replaced, many service technicians also recommend that the heater core also be replaced. This is especially true if the vehicle had a neglected cooling system. Most heater cores are close to or even have to be removed to replace an evaporator. The only additional cost to the vehicle owner is the cost of the heater core itself. Might As Well Do It Now