Thread: Climate control, Theory of operation?

There's currently a thread on the D3 forum regarding climate control and the need to manually turn off A/C to achieve an acceptable cabin temp.
I was wondering if one of the experts out there could educate the rest of us on how climate control works as I suspect it's not as simple as a thermostat sampling the cabin temperature and adjusting the heat to suit. Would there not have to be a sensor that takes into account the amount of sunlight coming into the cab as an interior temp of 22 might be comfortable on a cloudy day but on a bright sunny day would be too hot.
Anyone know how it works?

Regards,
Tote

further to that, there is a sensor in the middle of the dashboard, up near the windscreen. this measures light intensity or something along those lines. as the OP said, a 35deg cloudy day wont feel as hot in the car as a 30deg sunny one. this sensor helps adjust the system for these variables.