I also have the same problem with my air conditioner. It works when the temperature I moderate but shuts down when the temperature is above 85. I have owned the car since 1995. The problem was diagnosed as an exapnsion valve. The cost for repair will be $900. I was just surfing trying to get an idea about what an expansion valve is and I saw one for $37. I know labor is high, but what else should I be looking at here. I don't want to put big bucks into this car righ now. I have 127,000 miles on it.
