As this is now going off topic, I'll chuck in my 2p
Does anyone actally use the dual zone AC? I set both sides to how warm or cool I want the car - always the same temperature. If the passenger doesn't llike it, they can close the vents on their side.
AFAIK there is only one cabin temperature sensor, which is in the middle of the console - so I genuinely don't know how it can try to keep 2 temperatures.