What are the reasons for a car's air conditioning not being very cool?

[MacPiper]

Car air conditioning is a device that cools, heats, ventilates, and purifies the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and improving driving safety. The reasons why a car's air conditioning is not very cool are as follows: 1. The condenser is too dirty. 2. The air filter is too dirty. 3. The air conditioning is in long-term external circulation mode. 4. The belt is aging. Solutions: 1. Check if there is refrigerant in the system. If not, pressurize to check for leaks and refill as needed. 2. If there is refrigerant, check if the compressor is working. 3. Clean the condenser. 4. Replace the air filter.

[FernandoDella]

I've been driving for over thirty years and know that if the air conditioning isn't cooling well, it's mostly due to insufficient refrigerant or a leak. If there are pinholes in the pipes causing the refrigerant to leak, the cooling effect is greatly reduced. It could also be that the air filter is too dirty and clogged, preventing air from flowing out and making the car less cool. Compressor failure or a loose belt can also reduce cooling efficiency, and if the engine heat isn't dissipated properly, it's even worse. You need to go to a shop to check the refrigerant pressure and for leaks, while also regularly changing the filter to avoid expensive repairs. Pay attention to the engine operating temperature, as long drives in hot weather are more likely to cause problems, so preventive maintenance is crucial.

[McEleanor]

My car is mainly used for commuting. When the AC suddenly stops cooling, it might be due to the condenser being clogged with dust and unable to dissipate heat. In summer, bugs and leaves sticking to it need to be cleaned. If the fan isn't spinning or isn't powerful enough, hot air can't be expelled, naturally reducing cooling efficiency. Air or moisture entering the refrigeration system can also diminish performance, especially when starting the car after parking in the rainy season. It's recommended to clean the condenser grid with a soft brush yourself and switch to recirculation mode to prevent hot air from entering. If the issue persists, have a professional evacuate the system, recharge the refrigerant, and perform a check.

[JasonMarie]

Poor air conditioning is often caused by a dirty filter blocking airflow, or insufficient refrigerant due to leaks not being replenished. A clogged expansion valve preventing refrigerant flow can also cause this. If the compressor isn't working properly, the AC won't cool at idle and needs repair. I recommend regular maintenance with filter replacements and checking system seals in summer to save money and hassle.