Mechanics

A/C RECHARGE

2002 Nissan Frontier

Air Conditioning problem
2002 Nissan Frontier 4 cyl Two Wheel Drive Automatic 82000 miles

There are two valves on the a/c system but neither are marked. How can I determine which valve is the one I need to put coolant into.
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Jeknapp
July 29, 2008.



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