I have a 2011 Range Rover that the a.c. would blow cold air for a few minutes then blow hot air. I noticed the two middle vents the left one was a little cooler than the right one. I carried it to one dealer and was told it was the pressure valve gone bad. I went to another dealer and was told that model didn't have a pressure valve and would need a new compressor. He advised it would also need a new fan and motor. They kept my car for 10 days to work on it. I picked it up yesterday and paid them $2,689.87. After about 10 miles I noticed it wasn't cooling like it should but I kept traveling the 160 miles to my home. My thermostat never cut off because it never got below 75 degrees. Does anybody on here have any idea what could be the problem?. This car only has 45,000 miles on it. Thanks!