How to Read an Automotive Refrigerant Pressure Gauge?

1 Answers
LaJoel
07/28/25 2:24pm
Locate the high-pressure and low-pressure ports of the car's air conditioning system and connect the refrigerant charging gauge. Turn on the car's air conditioning to start its operation. Once the air conditioning is running, observe the gauge readings. Under normal conditions, the low-pressure reading should be maintained between 3-4, and the high-pressure reading should be between 10-15. The scale on the refrigerant charging gauge indicates pressure, allowing you to determine the compressor's discharge and intake pressures, thereby assessing whether the system is operating normally.
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