Final answer:
The replacement of a condenser fan motor is always considered a major repair according to the EPA's regulations.
Step-by-step explanation:
According to the EPA's regulations, the repair that would ALWAYS be considered 'major' is the replacement of a condenser fan motor.
The condenser fan motor is a crucial component of an air conditioner as it is responsible for removing the heat from the refrigerant and cooling it down. Its failure can lead to overheating of the system and a complete breakdown of the air conditioning unit.
Therefore, replacing a condenser fan motor is considered a major repair because it involves replacing a vital component of the system that directly affects its functioning.