True or False: An expansion device is a common component of heat pumps and air conditioners.

An expansion device is indeed a common component in heat pumps and air conditioners because it plays a crucial role in the refrigeration cycle. The main function of the expansion device is to control the flow of refrigerant into the evaporator coil. It reduces the pressure of the refrigerant, allowing it to expand and absorb heat from the environment, which is essential for both cooling in air conditioners and heating in heat pumps.

Without the expansion device, the refrigerant would not effectively transition from a high-pressure, liquid state to a low-pressure, gaseous state, which is necessary for the heat exchange process to occur. This component helps maintain the efficiency and effectiveness of the system, regardless of whether it is a residential or commercial unit. Its presence is vital in modern heat pumps and air conditioning systems, supporting their functionality regardless of the age of the model.