How often should car Freon be replaced?

[Matthew]

There is no fixed replacement interval for car Freon. It should be replaced or refilled when the cooling effect of the car air conditioner deteriorates. After using the car air conditioner for more than half a year, obvious signs of oil leakage will appear at the pipe joints of the indoor unit and the valves of the outdoor unit, indicating that the machine has leaks, oil and Freon are mutually soluble, oil leakage must mean Freon leakage, and Freon leakage must mean oil leakage. In such cases, the refrigerant should be replenished or replaced. The car air conditioner is used to adjust and control the temperature, humidity, air cleanliness, and air flow inside the car cabin to a suitable state, providing a comfortable riding environment for passengers, reducing travel fatigue, creating good working conditions for the driver, and serving as an important ventilation device to ensure safe driving.