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I bought a 2012 Gas version G AT Toyota Fortuner.. After a couole of months my AC is not cooling when I have it checked they said its low on freon so I have it refilled.. Now I refilled it twice every 3 months.. now we did a pressure test compressed air.. we waited for atleast 30 min to see if there’s a drop on the gauge but it didn’t move.. no lose of pressure.. he recommended adding oil to the compressor and refill again of freon.. he said maybe it has a low amount of oil that it’s causing high pressure that leads to dissolving the freon.. now I am on the observed method again if it last 3 months or more then that solves my problem.. but if it needs refill again after 3 months whats the next thing to do? is the mechanic right with his diagnose? please advice.. thank you
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Oil does not dissolve Freon/ refrigerant. If your low on charge in 3 months twice then the charge is leaking out. If you have high head pressure
that would cause a no cooling symptom. Here are some guides to help you. https://www.ericthecarguy.com/faq/solving-automotive-hvac-problems
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