Boeing 737-800 Temperature Selector
From the FCOM:
Temperature Selector
AUTO – provides automatic temperature control for the associated zones.
Rotating the control toward C (cool) or W (warm) manually sets the desired
temperature.
OFF – closes the associated trim air modulating valve.
Through my flights we never set it to AUTO and every flight i'm used for cabin crew asking to warm or cool the aft & fwd cabin, When do you actually set the temp selectors to AUTO & what will be the temperature for the 3 zones in the automatic temperature control mode. is there a way to adjust the temperature every flight without the same typical scenario for each flight cabin crew asks for more to warm or to cool aft & fwd cabin?.