What's the reason for poor air conditioning cooling in BMW 3 Series?

[Barbara]

Poor air conditioning cooling in BMW 3 Series may be caused by refrigerant leakage; reduced heat dissipation capacity of the condenser; blocked air ducts or dirty air conditioning pipelines; prolonged use of external circulation, etc. It is recommended to go to a professional repair shop for inspection and treatment. BMW (Bavarian Motor Works), the full Chinese name is Bayerische Motoren Werke AG, a German luxury car brand. BMW's car series include i, X, Z, and pure number models, with several series such as 1, 2, 3, 4, 5, 6, 7, 8. The following are the functions of car air conditioning: 1. Temperature adjustment: This is the main function of car air conditioning. In summer, the cooling system produces cold air to cool the cabin; in winter, except for large commercial vehicles that use independent combustion heaters for heating, other vehicles basically use the car's waste heat for heating. 2. Humidity adjustment: Humidity has a great impact on the comfort of passengers in the car. The humidity in the cabin should generally be maintained at 30%-70%. Ordinary car air conditioners do not have the function of adjusting the humidity inside the car, only through the use of ventilation devices or high-end luxury cars equipped with integrated heating and cooling air conditioners. 3. Airflow adjustment: The speed and direction of airflow greatly affect human comfort. If blowing directly, when the temperature is suitable, the speed should be limited to a certain range. The speed can be appropriately changed according to the passenger's living environment, age, health status, and cold and heat habits. 4. Air purification: The air quality in the cabin is an important guarantee of comfort.