What is the general pressure for adding refrigerant to a car's air conditioning system?

[DiJosephine]

General pressure for adding refrigerant to a car's air conditioning system: High pressure 1.3-1.7MPA; Low pressure 0.1-0.25MPA. The introduction to air conditioning refrigerant pressure is as follows: 1. If the pressure is higher or lower than the above range, it indicates abnormal expansion valve adjustment. Compressor issues are not included in this category. 2. When measuring the pressure of the air conditioning system, the engine should be idling, and the measurement should be taken at an ambient temperature of 35℃. 3. When the engine throttle is increased, the measured low pressure should decrease with the engine speed. The faster the speed, the greater the pressure drop, indicating good compressor performance. Conversely, it indicates a compressor malfunction.