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What is the normal pressure for adding refrigerant to a car air conditioner?

1 Answers
VanChase
07/25/25 8:47am
The normal pressure for adding refrigerant to a car air conditioner is: low pressure 150 to 250 kPa, high pressure 1300 to 1500 kPa. After completing the refrigerant charging, close the low-pressure manual valve on the manifold gauge, shut off the injection valve on the refrigerant canister, stop the engine, and quickly remove the manifold gauge from the compressor to avoid excessive refrigerant leakage. Methods for charging car refrigerant: 1. High-pressure side charging; 2. Low-pressure side charging. Due to the different states of the refrigerant being charged, these two methods vary significantly. High-pressure side charging involves liquid refrigerant, suitable for initial charging after leak detection and vacuuming. Note that this method requires the engine to be off and the refrigerant canister to be inverted. The other method, low-pressure side charging, involves gas and is slower, typically used for supplementing refrigerant.
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