Why is the car air conditioning not cooling well?
2 Answers
Air conditioning not cooling most common fault points are: 1. Refrigerant leakage: The refrigerant in the air conditioning system has completely leaked out, resulting in no refrigerant, so the air conditioning does not cool. You can check whether the pipelines in the air conditioning system, the air conditioning pump, condenser, evaporator box and other components are damaged, leading to refrigerant leakage. Another inspection method is to add fluorescent agent while adding refrigerant. After using the vehicle for a week, use a special fluorescent lamp to check the air conditioning system. If there is a leakage point, it will light up, indicating that this component is damaged. 2. Internal damage to the air conditioning pump: This results in the inability to start the cooling effect. Generally, damage to the air conditioning pump will produce abnormal noise. So check the air conditioning pump, and if it is damaged, it needs to be replaced. 3. The condenser fins in the air conditioning system are too dirty: This causes the pressure and temperature in the air conditioning system to be too high. To protect the air conditioning system, the air conditioning pump stops working, and the air conditioning does not cool. You can use a high-pressure water gun to clean the condenser fins. After cleaning, use a high-pressure air gun to dry them.
I was driving and noticed the air from the AC wasn't as cool as before, which really affected comfort. There could be several reasons. Insufficient refrigerant is a common issue—leaks in the system cause pressure drops, reducing cooling efficiency. A clogged cabin air filter can also block airflow, preventing cool air from coming out. If the compressor is broken, it won't work at all, but clutch issues can still be repaired. Dust buildup on the condenser fins reduces heat dissipation, especially in high temperatures. Faulty fans or blowers result in weak airflow, making it hard to cool down. Electrical problems like a blown fuse can be fixed easily by replacing it. I recommend first checking if the filter is dirty and ensuring the condenser is cleaned during regular maintenance. Driving without AC in the summer heat can lead to fatigue, so for safety's sake, it's best to get it checked and repaired by a professional shop as soon as possible.
