What is the primary purpose of the A/C compressor in an automotive HVAC system?

• A. Circulate refrigerant through the system
• B. Condense refrigerant into a liquid
• C. Remove moisture from cabin air
• D. Cool the condenser

Answer: (A)

The main idea is that the A/C compressor moves and pressurizes the refrigerant so it can circulate through the system and carry heat from the cabin to the outside. It draws low-pressure vapor from the evaporator, compresses it into a high-pressure, high-temperature gas, and sends it toward the condenser. That pressure drives the refrigerant through the rest of the cycle, allowing heat to be removed from the cabin as the refrigerant changes state and flows back to the evaporator. The other functions belong to different components: condensation happens in the condenser, moisture is removed by the dryer/receiver, and cooling the condenser is done by airflow over the condenser coils, not by the compressor.