Why is the car air conditioning not cooling effectively?
2 Answers
The reasons why the car air conditioning is not cooling effectively are as follows: 1. Insufficient Freon: When the ambient temperature is around 35 degrees Celsius, the air conditioning shows a low pressure of 0.45mp and a high pressure above 2.5mp, with a static pressure of 1.1-1.2mp. This usually occurs in older air conditioning systems that have been in use for three to four years. The cooling effect of the air conditioner decreases. Older air conditioners use Freon as a refrigerant, which can evaporate over time. Therefore, users only need to visit a professional air conditioning repair shop to have it refilled. Additionally, improper installation causing Freon leakage or issues with the machine itself cannot be ruled out. 2. Power supply voltage: Insufficient power supply voltage. The normal starting voltage for air conditioning is 220v+-10%. In China's power supply system with a phase voltage of 220v and a line voltage of 380v, almost all compressors can start at 200v or above. At 180v or above, 70-80% can start, and at 160v or above, only a few can start. Below 160v, it is almost impossible to start. Based on experience, a starting voltage above 190v is more reliable for the compressor. 3. Insufficient power: The general selection principle for air conditioning power is: 150-250w/square meter for cooling and 250-350w/square meter for heating. Additionally, factors such as space height, orientation, sealing performance, and number of occupants should be comprehensively considered.
The weather has been getting hotter recently, and I noticed that the air blowing from my car's air conditioning isn't cool at all, making the interior feel like a steamer. There could be several possible reasons, such as insufficient refrigerant—this is the liquid that makes the AC cool, and it might leak or evaporate over time. It could also be that the AC filter is too dirty and blocking the airflow; I remember a noticeable improvement after replacing the filter before. Another issue could be the compressor—if you hear a humming sound when starting but no cool air comes out, that's bad news. If the condenser is dirty or clogged, it can also affect cooling efficiency. I tried checking the filter location, opening it behind the glove compartment, and sure enough, it was covered in a thick layer of black dust. But it's best to take it to a professional auto shop for a proper inspection—don't tinker with it yourself. Safe driving is the priority, especially on long trips. Remember to clean the filter every six months to prevent many issues.
