How to Add Refrigerant to a Car's Air Conditioning System?
1 Answers
Here are the relevant steps for adding refrigerant to a car's air conditioning system: 1. First, assume there are no leaks in the air conditioning system. 2. Before adding refrigerant, prepare a vacuum pump, manifold gauge, refrigerant, electronic scale, etc. 3. Connect the manifold gauge to the vacuum pump and the charging port on the air conditioning system's pipeline to evacuate the system. Observe the scale on the manifold gauge. After reaching full vacuum, continue evacuating for at least half an hour (mainly to remove moisture from the system). Then, close the manifold gauge's hand valve, turn off the vacuum pump, and maintain pressure for about 10 minutes. 4. Check the manifold gauge's scale. If the system vacuum remains stable, disconnect the manifold gauge's hose from the vacuum pump. Connect one hose to the low-pressure pipe's charging port and the other to the refrigerant cylinder. Before opening the manifold gauge's hand valve, first open the refrigerant cylinder, loosen the pipe connection to purge air from the line using the refrigerant, and then tighten it. 5. If the specified refrigerant charge for the car's air conditioning system is known, use an electronic scale to measure the exact amount. The charging method is the same as above, except the amount is controlled by weighing the cylinder.
