What are the reasons why the car's air conditioning is not cooling when turned on?

2 Answers
SanHope
08/28/25 7:37am
Here are the reasons why the car's air conditioning is not cooling when turned on: 1. Dirty radiator: The radiator and condenser are important heat dissipation devices in the vehicle. If they are too dirty, it will lead to poor heat dissipation, causing the engine to overheat, which directly affects the cooling effect of the air conditioning. 2. Clogged air filter: The air filter's function is to prevent dust from entering the cabin. When the air filter is clogged, it severely affects the air volume of the air conditioning, impacting the cooling effect. 3. Airflow direction: Hot air rises, while cold air sinks. Adjusting the appropriate airflow direction helps maximize the air conditioning's performance.
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JesseRose
09/10/25 5:49am
I think if the car's AC isn't blowing cold air, we should first examine the entire refrigeration system. Having driven many cars, the most common issue I've encountered is refrigerant leaks or insufficient levels, which significantly reduces the AC's cooling power. Next is the compressor—if it fails to operate, cold air won't be produced. Blockages in the condenser or evaporator can also hinder heat dissipation. A malfunctioning fan motor might result in inadequate airflow, making it hard to lower the cabin temperature. Additionally, problems in the control system, such as faulty sensors or aging switches, can cause unstable AC operation. Regular maintenance is crucial; I recommend checking the refrigerant pressure and cleaning the radiator annually to avoid mid-journey breakdowns that could affect summer driving comfort.
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