I recently had a problem with car such that the a/c was blowing only hot air. A trip to dealer showed an undiscovered leak in the refrigerant from the system. They were unable to find the leak after 4 hours and have placed a dye in the refrigerant to try to find the 'pin hole' leak. I've never had this problem with a Japanese vehicle. Has anyone else experienced this problem? I now am supposed to drive the car for 3 months and return the vehicle for 'discovery' of the leak.