location of low side charging port

2001 LINCOLN NAVIGATOR

DAVID CALLAHAN

MEMBER
1 POST

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 2:27 AM

STRAILER

✓Experienced Mechanic
55,224 POSTS

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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Professional Diagram for 2CarPros Members
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Sep 29, 2017 at 11:07 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.