As standard TK flight crews put the temp up 2 degrees celsius higher than about any other airline. Many then put it up another 2 degrees, and yes their cabins are normally way too hot, so we are talking about their standard being at 24 degrees, while on most other airlines it is 22 degrees. When one combines this with the attitude of most of their flight crews, plus the fact that on some aircraft no one but the most senior FA's seem to know how to adjust zones of the aircraft, this is where you normally get problems. Rozy's comments are illuminating, as often the crew will say such nonsense, and have no idea that temperature is influenced by the load, etc, and most cannot be bothered. Quite frankly I think they just want to keep it hot so people sleep more and bother them less. Furthermore, the home market has a marked "fear" of cold, which manifests itself over heated buildings, cars, etc. Unfortunately its a regional thing.