I have a 2015 Nissan Altima and the air conditioning is not blowing as cold as it should all the time. Took it to a shop last week and they drained the system and put the refrigerant back in and it worked nice and cold for about 4 days. Now it is back to not so cold again. Could it be the expansion valve? Any help is appreciated
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Did they test the system for leaks? It sounds like some of the freon has leaked out.
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