What is the method for checking refrigerant leaks?

[VonWyatt]

Here are the methods for detecting refrigerant leaks in cars: Bubble Method: First, observe the air conditioning pipelines and various interfaces, especially the high and low pressure pipes between the compressor and expansion valve, for any oil stains. Then, pressurize the system and spray soapy water to check for bubbles. If bubbles appear, it indicates a leak. If the leak is at the interface, replace the sealing ring. If the leak is in the pipeline, replace the pipeline. Electronic Detection Method: Electronic leak detection is a new popular inspection method in recent years. During the inspection, move the detection probe over potential leak areas. When the detection device sounds an alarm, it indicates a significant leak at that location. However, electronic leak detection is easily affected by external environmental factors such as gasoline, exhaust fumes, and odors, which may prevent the detector from accurately locating the leak.