What are the methods for detecting leaks in car air conditioning?

[McNaomi]

Methods for detecting leaks in car air conditioning include: 1. Checking for oil traces, as refrigerant and compressor oil are mutually soluble, so oil traces will appear at the leak site; 2. Soap bubble test, applying soapy water to potential leak areas, where bubbles will form if there is a leak; 3. Dye testing, adding a dye-mixed refrigerant to the system, which will leave visible colored traces at the leak site; 4. Halogen leak detector; 5. Electronic leak detector; 6. Fluorescent tracer test; 7. Water immersion test; 8. Positive pressure test; 9. Negative pressure test. Car air conditioning is an air regulation device installed in vehicles, capable of cooling, heating, ventilating, and purifying the air inside the cabin, providing a comfortable environment for passengers, reducing driver fatigue, and improving driving safety.