My Lexus RX 350 recently started blowing hot air. I had gotten the refrigerant levels in the car checked and the levels looked fine. I went out of state for a week and the car was not ran up until I got back from my trip, as I had taken it directly to the Lexus dealership. I was told that the evaporator and a valve would need to be replaced. I ended up spending $3500 on this repair. Not even 24 hours later, the AC fails again completely. I bring the car back in immediately and they tell me that the compressor and the clutch are going out now due to low refrigerant in the cars system. They are wanting me to pay another $2200. The dealership is unwilling to work with me as they do not believe that this is their issue. I feel as if my car might have been misdiagnosed or there was an oversight in the examination. Any opinions?