Question about 2001 Chevrolet Suburban

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01 Suburban AC question

I have two AC pressure connections with different diameters in the same line on my 01 Suburban. Is one of these the low pressure and one the high? How can that be?

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Check the space between the ports, it is common to have both fittings on the same line if and only if the orifice tube is located between them because thats what seperates the low pressure side from the high pressure side, the high pressure side will be warm to hot when the a/c is running, once the hot liquid hits the orifice tube it turns into a cool vapor, so if you feel one side is hot and one side is cool then the orifice tube is whats between them and it is true that the low and high pressure sides can be on the same line.

Posted on Jun 30, 2009

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