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How to Perform Pressure Testing and Leak Detection on Car Air Conditioning?

1 Answers

DiConnor

07/30/25 3:46am

Steps for performing pressure testing and leak detection on car air conditioning: 1. Correctly connect the air conditioning pressure gauge to the high and low-pressure pipelines of the air conditioning system (red for high pressure, blue for low pressure), then connect the air pump for pressurization. 2. After pressurization, close the high and low-pressure valves of the pressure gauge, let it stand for 10-15 minutes, observe the pressure gauge pointer to check if there is any leakage in the air conditioning system, and locate the leak points. Precautions for pressure testing and leak detection: 1. The pressure for car air conditioning testing is generally around 20-30Bar, which is higher than the working pressure of the car air conditioning system. 2. Note that air conditioning vacuuming and refrigerant addition can only be performed after leak detection. After completing the pressure testing and leak detection and vacuuming, you can directly add the refrigerant.

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