Nissan Repair Questions? Ask a Mechanic for Answers ASAP
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Your AC system comes with a Dye in it. So if there is any leaks in the AC system a pair of Yellow glasses and a black light would be able to locate it. So I would start by looking around for a leak. If you don't see any, then you would need to evacuate the Freon from the system to see how much is in it. Then after you recover it and you see how much you have removed, then you want to use a AC vacuum pump to put the AC system into a Vacuum state. Once you put the system into a -30 vacuum state, then close all valves and leave it in a vacuum state for 5 to 10 mins to see if it stays there. If it does, then you want to charge the AC system to the proper amount. Once you have the proper amount of freon in the AC system then you want to check AC operation. Most of the time which I would say 90% of the time when a AC system does not work, it's due to freon level or a leak.
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