The 757 suffered badly from the filters covering the cabin temperature sensors getting blocked with dust and fluff. consequently you’d end up with each end of the same section of cabin suffering from different temperature extremes with one controller to set both temps! Magnify that 3 times (due to the number of sections on board) and you end up inundated with cabin crew interphone requests for temp changes. The bus doesn’t seem to suffer from clogged filters (as 1L says) so the temps seem to remain constant and the only changes our crew make on their own panels are in order to aid sleep at night time.

Interesting to see that Embraer have used the same system principle.