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Gauge manifold readout interpretation

Trying to diagnose a central air conditioning system using a freon gauge manifold. How can I tell what the gauge is showing me? Gauge readout analysis

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First of what is the problem taht you are having? To properly diagnose a air conditionign system yoiu have to look at more then just the refrigerant pressures. There is airflow and also duct design and a whole list of other variables. If you haven't done it then my suggestion is to checkout the local colleges in your are and see if they have ight classes to attend to learn more. I had to go to school for 2 years to get my degree and am still learning every day that I am working. thats been 20 years now. Good luck.

Posted on Jan 06, 2009

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You'll need a kit, available at Wal-Mart/Auto Zone/similar. The kit will contain a method of attaching a can of freon to a valve, a hose and gauge, a connection that puts the freon into your system. The freon goes into the Low pressure port, which is the larger line at your compressor, and the cap should have the letter "L" on the top of it. NEVER add freon to the high pressure port. It is on the smaller line and will have the letter "H" on the port cap.
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Get the type of kit that has the gauge built into it, so you do not wind up overfilling the system. Dispense the freon with the can valve up, so you don't put liquid freon into your compressor.
Then, watch the gauge until it gets in range. Close the valve on the can, shut your vehicle off. Remove the hose quickly to avoid freon loss. Replace the valve cap. Chill!
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You should have no trouble putting freon in your system. Just be mindful where you place your hands and equipment,and you'll do fine.

Best regards, --W/D--

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