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Once the valve is open let your vacuum run at full speed for 15 to 30 minutes to pull out as much air as it can.

How to vacuum car ac system with pump.

Hooking up the manifold gauge to vacuum ac system. To use a vacuum pump on an air conditioner first turn the pump on and open the side gauge valve which will allow the vacuum to start pulling air out of your system. Creating a vacuum deep enough to boil moisture away by using a vacuum pump on a regular basis is an effective low cost method of maintaining a healthy ac system. This applies to the newer r134a refrigerant systems as well as the older r12 systems.

One thing straight remember to keep the valves on the closed position before connecting to ac system. Bryan goes deep into how to evacuate or vacuum an air conditioner in a video collaboration with paul from the engineering mindset channel. Condensed water particles corrode the ac system and cause long term damage. With a vacuum pump connected to both low and high air conditioning system sides pull a deep vacuum for at least 5 45 minutes.

Next you need to connect the red colored valve to the high pressure port and the blue colored valve to the lower one. Pumps can be purchased or rented if you don t want to make a permanent investment.

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