2009 Sonata. Several months ago, AC started to not blow cold. First no cold on the drivers side vents while it still blew cold on the passenger side vents for maybe a month, then no cold air on both sides.
I read online that this means the refrigerant was going or gone. I see that I can buy a re-charge kit online for about $60. Should I just buy and try that first and hope that it also fixes whatever leak there is? How would I know that it is not the compressor or whatever belt or the mechanisms that drive the compressor? Do I need to take it to a shop for diagnosis? Or should I just go with trial and error by doing the recharge myself as the first step?