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15 Car AC Components and Their Functions Individually!

15 Car AC Components and Their Functions Individually!

4 February 2026 | MyProtection News Jakarta

A properly functioning car AC can provide comfort to the driver while driving, making the air cooler and improving air circulation.

To perform its function, a car's AC consists of various components that work together and support each other.

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15 Car AC Components and Their Functions Individually!

To perform its job properly, the car's AC system consists of various components that work together for optimal results.

But do you know the functions of each car's AC component and what parts make up the system? Let’s take a closer look!

1. AC Compressor

The first component in a car AC system is the compressor, which pumps freon gas so it can circulate to other AC parts.

In addition, the compressor compresses the refrigerant, changing it from a gas into liquid form.

The AC compressor is divided into two sections that both work to pump refrigerant toward the condenser. The first one is the suction line (low pressure), connecting the refrigerant from the evaporator, and the discharge line (high pressure), connecting the refrigerant to the condenser.

2. Condenser

The next car's AC component is the condenser, which helps regulate the AC temperature inside the car.

The condenser works by releasing heat from the freon, which is then cooled down with the help of the cooling fan.

3. Freon

The next and most familiar component in car AC is freon, a chemical refrigerant that absorbs heat from the cabin air and releases it outside.

Because of this function, if your car's AC no longer blows cold air, one of the possible causes is low or empty freon.

4. Receiver Dryer

The receiver dryer filters dirt and moisture from the AC system. It is located between the condenser and the expansion valve.

This component helps protect the AC system from issues such as clogged expansion valves or compressor corrosion, which can reduce the overall performance of the AC.

5. Expansion Valve

The expansion valve changes liquid freon into gas through a spraying process.

This process makes the refrigerant colder before it flows into the evaporator to absorb heat and produce cool air inside the car cabin.

6. Evaporator

The evaporator plays a vital role in cooling. Its main job is to absorb heat inside the cabin and convert it into cool air.

Sometimes referred to as the AC filter, the refrigerant in the evaporator is cooled first before it flows into the cabin to provide cold air.

7. Cooling Fan

The cooling fan helps lower the condenser’s temperature by blowing air over it. This process cools the freon more effectively, making the AC system more efficient.

Without the cooling fan, the freon would not cool properly, the AC system would be less effective, and its performance could drop significantly.

8. Magnetic Clutch

The magnetic clutch in a car's AC is an electrical component that stops the freon pressure when it gets too high.

Even though the engine pulley keeps spinning, the magnetic clutch controls when the compressor turns on and off.

When the compressor is active, freon pressure rises, especially when the engine is revved.

The magnetic clutch uses magnetic force to connect or disconnect the compressor pulley and shaft, protecting the AC system from damage.

In addition to the car AC components above, there are some other important components as well, including the thermistor, high-pressure hose, low-pressure hose, blower, pressure switch, relay, and cabin filter.

*PT Lippo General Insurance Tbk is licensed and supervised by Financial Services Authority (OJK)

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MyProtection is one of the pioneer portals for purchasing health insurance and general insurance online which can be accessed via website and application platforms since 2017.
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