The Trane BRD05311 Main Board, compatible with version 5.2 or newer of control system 30226254, is an electronic control component designed for compatible Trane HVAC equipment. It processes system inputs and coordinates key operating functions to support proper equipment performance. Used in compatible heating, ventilation, and air conditioning systems, the board helps manage componen... https://www.partshnc.com/trane-brd05311-main-board-30226254-version-5-2-or-newer