How do you get air out of auto air conditioning system?

Removing air from an automotive air conditioning system is known as "bleeding" or "purging" the system. Here's a general guide on how to do this:

1. Identify Low Points:

Locate the low points in the A/C system, such as the low-pressure service port and any low spots in the refrigerant lines.

2. Turn Off the Engine:

Ensure the vehicle's engine is turned off before starting the air bleeding process.

3. Connect Service Gauges:

Connect A/C service gauges to the high and low-pressure service ports. The low-pressure side is typically used for this procedure.

4. Open Valves:

Open the high and low-side service valves on the A/C service gauges. This allows refrigerant to flow through the system.

5. Evacuate Air:

Evacuate air from the system by allowing refrigerant to flow until a steady stream without air bubbles is observed. This is usually done on the low-pressure side.

6. Check for Leaks:

While bleeding the air, also check for any signs of refrigerant leaks. Leaks can introduce air into the system.

7. Close Valves:

Once the air is purged, close the high and low-side service valves on the A/C service gauges.

8. Recharge Refrigerant:

If needed, recharge the refrigerant in the system to the manufacturer's specifications.

9. Restart the System:

Start the vehicle's engine and turn on the A/C system. Check for proper cooling performance.