A few days ago, I committed a bunch of code past v2.5.2, labelled v2.5.3. I've been testing this in my car, but the results are not good. I'm getting crashes, and that is causing the cooldown (when configured in ACC mode) to restart. For the moment, I suggest people don't try past 7a6ecc4 (tag: v2.5.2). I'm working on getting the bugs out, but the test cycles are taking me 24-48 hours each, so this is taking some time. I'll let you know as soon as it is stable enough for wider testing. A bit of better news: I finally found a minor typo (CAN ID 0x100 B1=0x8F not B1=0x87) that has been driving me up the wall for the past few weeks. HVAC monitoring during cooldown now seems to be working well, and I'm getting better results for cooldown. At this rate, I may just have cooldown working properly in time to work on heatup for the winter :-( Regards, Mark.