How to evacuate and (pulling vacuum on an R134a car AC system)

Follow the steps below and you will come to see the best result to your aiconditioning system.


1.Turn off the air conditioning in the car and switch off the car engine.

2.Hook up the refrigerant gauge manifold set. The pump hose should be attached to the low-pressure port of the refrigerant gauge. The hose is attached, in simplified terms, to the port that is found in the middle of the gauges. This step is very important in vacuuming the AC system. It helps maintain the vacuum even after the pump shuts down. Refrigerant can be added only after the correct level of vacuum is maintained.