Should refrigerant be added to the low or high pressure side of a car's air conditioning system?

[KayleeLynn]

Refrigerant can be added to either the low or high pressure side of a car's air conditioning system. Adding to the high pressure side involves liquid refrigerant, which is suitable for initial charging after leak detection and vacuuming. Note that this method requires the engine to be off and the refrigerant can must be inverted. The other method, low pressure charging, involves gas and is slower, typically used for topping up refrigerant. The car air conditioning system is designed to regulate and control the temperature, humidity, air cleanliness, and airflow within the vehicle cabin to an optimal state. It provides a comfortable environment for passengers, reduces travel fatigue, creates good working conditions for the driver, and plays a crucial role as a ventilation device in ensuring safe driving.