How to Read an Automotive Air Conditioning Refrigerant Gauge?

1 Answers
MacPenelope
07/30/25 10:54am
Low pressure between 3~4 and high pressure between 10~15 are normal values. Below is an introduction related to air conditioning: 1. Air conditioning system: The air conditioning system in motor vehicles can adjust the temperature, humidity, and air cleanliness inside the cabin. The vehicle's air conditioning system is generally composed of a refrigeration device, heating device, and ventilation device, making full use of the limited space inside the car. It can adjust the temperature according to the needs of the passengers in the vehicle, and after temperature adjustment, the vehicle's air vents need to be opened. 2. Refrigerant gauge: The scale on the refrigerant gauge indicates pressure. Through the pressure display, you can know the compressor's discharge pressure (high pressure) and intake pressure (low pressure), and determine whether the system is operating normally, such as system blockages, refrigerant leaks, and other faults. The gauge should have MPa (megapascal) and bar, which are commonly used pressure units in China.
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