My 2009 Nissan Maxima has cold air when idling, but when I get on the Highway it tends to get warm for a while then it kicks back on to cold. Not sure what the issue is.
How do I fix it?
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How long have you had this car? If it's been years and you haven't had the a/c worked on and checked, you might need a full tune-up. Your possible issues:
My bet is # 2), which can include a bit of # 1), if you are low on engine coolant/oil, engine is running poorly because of tune, of A/C needs recharge WITH system lubricant, I won't be surprised. Can you check any of those things yourself? Cheers!