Where to Add Refrigerant to Car Air Conditioning?

[MacDelilah]

Refrigerant for car air conditioning can be added at the high and low-pressure ports of the air conditioning system. The method is as follows: 1. After the system is vacuumed, close the high and low-pressure manual valves on the manifold gauge; 2. Connect one end of the middle hose to the refrigerant tank injection valve, open the refrigerant tank valve, then loosen the nut on the manifold gauge hose to let gas escape for a few minutes before tightening it; 3. Open the high-pressure side manual valve and inject the specified amount of liquid refrigerant. After adding the refrigerant, close the manual valve on the manifold gauge and the injection valve on the refrigerant tank, stop the engine, and quickly remove the manifold gauge from the compressor to prevent excessive refrigerant leakage.