There are essentially three important parts that make up your car’s A/C system, namely the condenser, compressor, and evaporator. The other components ensure smooth operation of the car A/C system. In this post, we shall learn more about these three A/C components.


A component that falls on the high-pressure side of an A/C system, it is but a special type of pump that compresses the low-pressure refrigerant gas which is then fed into another component known as the condenser. The compressor draws compression power from the engine via a belt that is attached to the latter’s crankshaft.

The refrigerant referred to as either HFC-134a or R-134a is the standard for all car A/Cs in the United States since 1996. While this coolant can exist in both liquid and gaseous form, it is fed into the compressor as a gas.


Another from the high-pressure category, it is simply a radiator for the A/C loop that helps in the dissipation of heat collected by the coolant from inside the passenger cabin into the atmosphere outside.

When high-pressure refrigerant gas is fed into it from the compressor, it passes through the condenser unit’s twisty tubes and is cooled down by the outside air flowing around them turning the R-134a gas to a high-pressure liquid form; now ready to cool the vehicle’s interior.


This is part of the vehicle’s A/C system where the actual cooling is experienced. Shaped like a radiator, the evaporator unit’s tubes and fins are meant to absorb heat from the passenger’s compartment.

To accomplish this, the refrigerant in its liquid form (at 32 degrees Fahrenheit) enters the evaporator coils situated in the car interior and as it collects heat from the passenger compartment.

Due to its low boiling point, the refrigerant quickly turns into gas while a fan blowing over the coil transfers cold air into the compartment. The gas is then fed back into the compressor to restart the cycle all over again.