Which of the following functions is NOT performed by a cabin pressure control system?

The cabin pressure control system is primarily responsible for maintaining the appropriate pressure within the aircraft's cabin during flight. This includes functions such as dumping cabin pressure in an emergency situation, providing pressure relief to prevent excessive pressure build-up, and vacuum relief to handle situations where cabin pressure might drop below atmospheric pressure.

Regulating cabin temperature, however, is not a function of the cabin pressure control system. Instead, this task falls to the environmental control system (ECS) of the aircraft, which is designed to manage air conditioning and temperature control within the cabin. While the cabin pressure control system and the ECS may work together to ensure passenger comfort and safety, regulating the temperature itself is outside the scope of the cabin pressure control system's responsibilities.