4 way valve assembly

Bosch 4‑way valve assembly (part number 8733956462) is a field‑replaceable valve module used in reversible HVAC systems to direct refrigerant flow between heating and cooling modes; it facilitates reliable mode change and simplifies service and replacement on split and packaged heat pump equipment. Exact Bosch North America documentation for part 8733956462 was not located on Bosch sites, so this description is based on Bosch technical material describing reversing (4‑way) valves and reversible heat pump systems. (bosch-homecomfort.com)