Anyone else having problems with their air conditioning systems? Two failures so far - one last summer (coolant leak), and another today. When I turned on the air, I heard a hissing sound, which quickly went away after I turned the fan off. No cold at at all. I just happened to be near my dealership (I live 2 hours away), so I'm hoping it can be fixed before I head home. Second problem in 2 years... anyone else having this issue?