Air Conditioning Repair Certification (ETI) Practice Exam

The function of the discharge line in an air conditioning system is to carry hot gas from the compressor to the condenser. When the compressor operates, it compresses the refrigerant, which raises its pressure and temperature. This hot, high-pressure gas is then routed through the discharge line to the condenser.

In the condenser, the refrigerant releases heat to the outdoor air and condenses into a liquid as it cools down. This step is essential for the refrigeration cycle to progress, as it prepares the refrigerant to flow back to the evaporator where it can absorb heat from the indoor air. Understanding the role of the discharge line is crucial for anyone involved in air conditioning repair or maintenance, as it emphasizes how the refrigerant is transported within the system and highlights the importance of the compressor in maintaining efficient cooling.