Automotive Service Excellence (ASE) Air Conditioner Certification Practice Exam 2025 - Free ASE Air Conditioner Practice Questions and Study Guide

The primary function of the compressor in an AC system is to circulate refrigerant through the system. This is fundamental to the AC's operation because the compressor is responsible for pressurizing the refrigerant, which changes it from a low-pressure gas to a high-pressure gas. This change in state is essential for the refrigerant to flow through the system and undergo the necessary phase changes that enable it to absorb and release heat, ultimately resulting in cooling.

By compressing the refrigerant, the compressor facilitates the flow of the refrigerant to the condenser and then to the evaporator. The continuous circulation allows the entire system to work as designed, maintaining the cooling cycle and ensuring that the passenger cabin remains comfortable.

Each component, such as the condenser, evaporator, and expansion valve, relies on this circulation to function properly. While the other functions listed, like regulating cabin temperature and removing moisture, are important aspects of the AC system's overall function, they hinge on the compressor's ability to circulate refrigerant effectively.