2010 Hyundai Elantra Owner's Manual - Page 147

Features of your vehicle Checking the amount of air conditioner refrigerant and compressor lubricant When the amount of refrigerant is low, the performance of the air conditioning is reduced. Overfilling also has a bad influence on the air conditioning system. Therefore, if abnormal operation is found, have the system inspected by an authorized Hyundai dealer. CAUTION The air conditioning system should be serviced by an authorized Hyundai dealer. Improper service may cause serious injury to the person performing the service. ✽ NOTICE When the performance of the air conditioning system is reduced it is important that the correct type and amount of oil and refrigerant is used. Otherwise, damage to the compressor and abnormal system operation may occur. 4 74