HOW DOES THE AIR CONDITIONING IN MY CAR WORK?

A vehicle’s air conditioning system does not create cold air. It actually takes the heat and moisture out of the air that is already in your car, leaving behind cooler air. Having a good understanding of how the components work can help to explain the methods of repairs in the air conditioning system.

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The freon/refrigerant resides in the a/c system. The a/c compressor initiates the high-side of the system where it is compresses the freon/refrigerant into a high-pressure state causing it to liquefy. It travels through the high-pressure lines to the condenser. The condenser which is similar to a small radiator, puts the liquid in contact with fresh air on the outside of the vehicle, which absorbs the heat from the liquid. It then flows into the expansion valve or orifice tube where it is restricted and becomes gaseous into the low-pressure side of the a/c system. Then it flows into the receiver dryer/accumulator that contains a desiccant bag to remove and collect unwanted moisture/water and impurities. The clean gaseous freon/refrigerant then travels through the tubing into the evaporator(that is usually located in the passenger compartment of the dash). Freon/refrigerant in its gaseous state is now able to absorb heat from the air passing through the evaporator fins, leaving behind the cooler air. Fans blow this cooler dry air into the car’s cabin. The refrigerant travels back to the compressor in the suction hose of the a/c system to get compressed back into the high-pressure gas and begin the process again.