location of low side charging port

2001 LINCOLN NAVIGATOR
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DAVID CALLAHAN
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Air Conditioning problem V8 Four Wheel Drive Automatic 137000 miles

I need to know where the low side of the air conditioner system is to add R134 refrigerant. I know it is the line that feels cold as the air conditioner is running. I can only see the high side (high pressure port) which is hot to the touch.
Jun 28, 2010 at 9:27 AM
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STRAILER
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The low side service valve is located on the accumulator near the fire wall. Here are some guides and diagrams to help you get the job done.

https://www.2carpros.com/articles/air-conditioner-how-to-add-freon

and

https://www.2carpros.com/articles/how-a-car-air-conditioner-works

and

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Here are some diagrams (Below)

Please let us know what you find.

Cheers, Ken
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Sep 29, 2017 at 6:07 PM