Samuel,
Personally, I haven't ran into this problem (at least our customers haven't mentioned it). It sounds like the dealer is having a problem recreating the actual issue, which I'm all too familiar with being a dealer tech
My suggestion would be to schedule an appointment once more. Prior to you arriving, get the car to have the problem to the point that it's very easy for you to reproduce. At that point, take it in to the dealer, do not shut the car off. No reset means the problem stays (in theory). The dealer tech can then hook up their diagnostic software to watch the signals coming from the HVAC unit.
It's possibly a software issue and they may not be able to do much until an update comes, so just keep that in mind. Hope that helps.
Personally, I haven't ran into this problem (at least our customers haven't mentioned it). It sounds like the dealer is having a problem recreating the actual issue, which I'm all too familiar with being a dealer tech
It's possibly a software issue and they may not be able to do much until an update comes, so just keep that in mind. Hope that helps.