Active recovery utilizes what system component to pump refrigerant into a recovery cylinder?

The correct answer is the compressor, as it plays a pivotal role in the active recovery process of refrigerants during service and repair procedures. The compressor is responsible for creating the pressure differential that allows the refrigerant to flow from the system into the recovery cylinder.

In active recovery, the refrigerant is not simply allowed to flow out of the system by the natural pressure difference; instead, the compressor actively pumps the refrigerant. This ensures a more efficient and complete recovery, minimizing the amount of refrigerant that could potentially remain in the system.

The other components do not serve the same purpose. The evaporator is involved in the cooling process by absorbing heat from the surrounding air, the condenser is responsible for converting the refrigerant from a gas back to a liquid by releasing heat, and the expansion valve regulates the flow of refrigerant into the evaporator but does not pump refrigerant actively. Therefore, the compressor is integral to the operation of an active recovery system, facilitating the safe and efficient transfer of refrigerant during maintenance procedures.