Just read through this thread and thought I share my a/c nightmare. So my a/c would have the same fooking delays explained here be OP and other posters. Sometimes the "delay" never came and I would go a whole day without a/c. Took the vehicle to a BMW dealership to get it diagnosed and after 2 hours of sitting in the waiting area, service adviser says my compressor is shot and its a $1600 repair bill with parts and labor. I ran from there with all four windows open. So now that I knew that it was the compressor because BMW said so, I purchased a reman'ed one and got it installed. To no avail, a/c still wouldn't work. Took the vehicle to a recommended shop in Jersey and after a diagnosed I was told that the climate control panel inside was not working. Got a used one and left the shop within an hour with freezing cold a/c. Drove the vehicle for 3 days with awesome a/c and on the fourth boom, a/c would not turn on again. I call the shop and explained that the shit went crazy again so I bring the vehicle back. It has been almost 2 weeks today and my vehicle is still in this shop. They have tried everything, even installing the old compressor that BMW said was shot (it wasn't). The owner of the shop has now taken my vehicle as a project because he says he has never seen anything like this. All components of the air condition system are working, and a/c works but after driving the vehicle for 20 minutes with a temperature gauge in the vents he notices that the temperature rises from 30 degrees to 70 and compressor stops. The compressor kicks back in after 10-20 minutes and this continues to happen. Finally today I call and hear the words/get the answer I was hoping to get... We have found the problem. There appears to be a short in the DME circuit that controls the a/c system. I need a new DME. Looking at a re-manufactured one now because a new one it out of the question.

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2002 3.0i (DOB: 5/2002)
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