I've read on this forum that others have had the problem I have had but I wanted some thoughts on what I should do... So, I've had my car for about a month now (S90D) and the first time the problem came up while I was charging my car at home. We had a power outage which interrupted the charge. Shortly thereafter I went to drive the car and noticed that the AC wasn't working. The fan was blowing but it was just warm air coming out. I tried a soft reset and nothing. I tried a hard reset and still nothing. I plugged the car back in and about an hour later, the AC was back. About 10 days later same problem except there was no power outage or charge interruption which may have been the cause but the AC was blowing warm air again. Waited about an hour and charged it and the AC came back. Fast forward to today and it happened again. Three times in 4 weeks. So, I called my nearest service centre while the AC was still not working. I was told that I need to note the time and day that this happens so that Tesla techs can try to figure out the problem and that I should wait until it "happens five more times" before booking a service appointment. Remember at the time my AC hadn't come back yet so I was a bit incredulous. I told the SC that I wear a suit everyday and I can't drive in a car with no AC because I would be a sweaty mess. The response was "yeah, but you said that the AC eventually comes back" , to which I said..."but how do I know it will come back this time?" So, I pretty much forced her into giving me an appointment on Monday morning but about 2 hours later the AC came back and I am concerned I may get the old "we can't duplicate the problem" bit, so I wanted to know if anyone knows what the definitive problem is on this issue and how to approach it with the SC?