Explain the function of the reversing valve in a heat pump.

Explain the function of the reversing valve in a heat pump.

• A. It changes the direction of refrigerant flow to switch between heating and cooling modes.
• B. It regulates refrigerant pressure.
• C. It filters the refrigerant.
• D. It controls the compressor speed.

Answer: (A)

The reversing valve is the device that changes the direction of refrigerant flow so a heat pump can switch between heating and cooling. It’s a four‑way valve that redirects which coil acts as the evaporator and which acts as the condenser. In cooling, the valve directs flow so the outdoor coil becomes the condenser and the indoor coil becomes the evaporator, releasing heat outside. In heating, it shifts to make the indoor coil the condenser (releasing heat inside) and the outdoor coil the evaporator (absorbing heat from outside). This is what lets one set of hardware provide both heating and cooling without separate systems. It isn’t responsible for regulating pressure, filtering, or controlling compressor speed.

The reversing valve is the device that changes the direction of refrigerant flow so a heat pump can switch between heating and cooling. It’s a four‑way valve that redirects which coil acts as the evaporator and which acts as the condenser. In cooling, the valve directs flow so the outdoor coil becomes the condenser and the indoor coil becomes the evaporator, releasing heat outside. In heating, it shifts to make the indoor coil the condenser (releasing heat inside) and the outdoor coil the evaporator (absorbing heat from outside). This is what lets one set of hardware provide both heating and cooling without separate systems. It isn’t responsible for regulating pressure, filtering, or controlling compressor speed.