Contrary to Auto Climate Control AC there is no way to select a particular temperature then what mechanism is present in this system? People mostly change fan speed to control AC cooling but its just fan speed and nothing to do with thermostat. In window Ac's there was a knob for thermostat which controls thermostat manual but there is no such knob in manual climate control Ac. Although one knob has Hot and Cold marking but its another story for some another day