Mitsubishi Electric U01A02961 4-Way Valve

The Mitsubishi Electric U01A02961 4-Way Valve is a refrigerant reversing component used in a heat pump system to change the direction of cooling flow between heating and cooling modes in HVAC systems. It redirects high- and low-pressure sides of the circuit so the indoor and outdoor coils can switch roles depending on operation. During mode changes or defrost cycles, the valve shifts position under coil activation to refrigerant pathways, enabling heat transfer reversal without altering the compressor or operation. Installed within the outdoor units sealed piping network, it plays a central role in cycle switching.