When the temperature starts rising, and your car AC is not working, this situation can be infuriating. In this scenario, you will most probably try tricks, but nothing will work as long as you do not know why the AC is not working. If you know the reason, you can find the right solution and keep your temper on the road. Here, we discuss different reasons why the car AC not working.

Why Your Car AC is Not Working?

We have listed a total of 15 reasons why your car AC stops working. Explore them one by one.

Clogged Cabin Filter

Your car’s cabin air filter keeps the air in the vehicle clean and free from dust, pollen, and other pollutants. As time passes, these particles accumulate and obstruct the air passage. It restricts the flow of air, causing the car AC to stop working. 

Low Refrigerant

Without the refrigerant properly functioning, your car can not circulate cold air throughout the cabin and maintain a comfortable temperature. 

Refrigerant Leak

Refrigerant leaks occur over time when hoses or seals start to degrade. An accident can also cause hoses or seals to leak. Over time, even the tiniest leak can allow refrigerant to escape from the system and leave your AC throwing warm air. Consider getting it repaired by a professional as soon as possible. 

Damaged Condenser

A condenser is set ahead of the radiator in front of the vehicle and cools the refrigerant by releasing heat outside. If debris hits the condenser or its fins damage over time, and it gets blocked, it can prevent your car AC from cooling the cabin. 

Faulty AC Blower

The blower motor pushes cool air into the cabin through the vents. In case the blower starts malfunctioning, you will likely notice weak or inconsistent airflow in the cabin, which leads to discomfort. 

Blown Fuse

A blown fuse is a simple yet overlooked reason why the AC is not working. It can directly disrupt the power supply to the car AC, causing it to stop. A blown fuse can also result in warm air being circulated inside the cabin. 

Engine Overheating

An overheated engine can make the fan in the radiator ineffective. It can severely affect the performance of the car AC and cause the refrigerant to blow hot air in the cabin. 

Blocked Expansion Valve

The expansion valve is responsible for regulating the refrigerant flow. If it is blocked or clogged due to debris buildup, it can impact the refrigerant flow, resulting in warm air coming into the cabin from the AC. 

Broken Compressor Belt

A compressor requires a huge amount of power to function properly. If the compressor becomes weak or worn out due to constant usage, this can cause the AC to malfunction. Weak compressor belts prevent your car from starting the AC. 

AC Leak

Your car AC has multiple components that pass air, so that it cools down. Leaks in the hoses, O-rings, or seals can significantly decrease the cooling efficiency of the AC. These leaks can occur due to accidents or collisions, cracks in the system, improper maintenance, or clogs that can cause pressure buildup in the system, compromising components. Leaving a leak unaddressed can lead to bigger problems later on. 

Broken Fans

The fans in your car AC can break like other components; If they do, it can restrict airflow. 

Compressor Issues

The AC compressor pressurizes and circulates refrigerant in the system. For this, the compressor changes the air pressure during the cooling process, helping to create an ideal environment to transfer heat energy away from the cabin and allow cold air to circulate.  

Electrical Problems

Your car AC consists of multiple electrical components. Problems with the wiring, the breaker, or the capacitor can easily result in electrical problems in the AC.

Faulty Pressure Switch

The pressure switch keeps track of pressure levels in the AC and ensures the stability of the refrigerant. If the refrigerant pressure fluctuates too much, it can cause damage to the compressor. A defective pressure switch can even prevent the compressor from engaging, resulting in warm air coming from the vents. 

Sensor Problems

The car AC has sensors that detect temperature and trigger the system to react by starting, stopping, or slowing down operations. A faulty sensor can lead to inaccurate temperature readings, which may cause your car AC to malfunction. 

What did you say? Your car AC is not working? Why worry when we are here? At Set Motor Sports, we serve all your needs with the best of our capabilities and ensure to leave your car in its best condition. Whether your car AC not working, or other issues are there, like a damaged windshield, punctured tires, or chipping paint, we take care of everything. Bring your car to us and leave with 100% satisfaction.