Last week we had our 2012 T&C Touring in for some repairs. The dealer replaced all the rockers and the top front camshaft. Prior to the job, the AC worked perfect...really cold air. Two days ago my wife complained that the AC didn't seem as cold. I checked it with a gauge and it was low on refrigerant. I added about 12 oz and all was well. Yesterday it wasn't quite as cold and today would only blow hot air. Before I call the dealer, I'm wondering.... did the dealer have to remove any AC lines in order to do the repairs? They also removed the transmission for a flex plate replacement. Anyone??? TIA