Which of the following is NOT a component of a typical AC system?

The component that is not typically part of an AC system is the temperature and pressure release valve. In standard air conditioning systems, the primary components include a compressor, evaporator coil, and condensing unit.

The compressor is crucial for circulating the refrigerant throughout the system, compressing it to raise its temperature and pressure before it passes through the condenser. The evaporator coil plays a vital role in absorbing heat from the air inside a building, which cools down the indoor environment. The condensing unit is essential for releasing the absorbed heat outside, transforming the refrigerant back into a liquid state.

While pressure relief mechanisms can be important in certain systems, such as boilers or refrigeration systems to ensure safety and prevent accidents, they are not standard features or components in typical air conditioning systems. Therefore, identifying the temperature and pressure release valve as not being a standard component helps clarify its absence in the context of conventional AC systems.