Air Conditioning Service Fundamentals – ASE Practice Question (VIDEO)

Description

A/C system designs are changing, and new refrigerants are being introduced. Technician A and Technician B are discussing the importance of proper diagnosis and repair of today’s climate control systems.

Which of the following statements related to A/C service IS NOT correct?
A) As little as a 10% overcharge of refrigerant could lead to premature compressor failure, due to the higher heat loads caused by the increased head pressures.
B) An undercharged system will have a hard time moving any excess oil from the evaporator core, leading to the internal coating of that heat exchanger and lower cooling capability.
C) Always follow the OEM oil balancing procedure when replacing a system component to avoid having added too much or too little to the system.
D) Compressor replacement should always be preceded by a thorough flushing of the system to remove contaminants and dirty oil.

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