The LiftMaster K001D8395 Commercial Logic Board (L5) is an OEM replacement control board for select LiftMaster commercial door operators built on the Logic 5.0 (L5) platform. As the central controller inside the operator head, this board manages open/close/stop commands, interfaces with limit circuits and safety inputs, and coordinates accessories and external controls for sectional and rolling steel door applications. Use it to restore reliable operation when the original L5 logic board is damaged or failing; it is intended only for operators that specifically use the L5/Logic 5.0 platform and is not interchangeable with earlier Logic 4.0 or later L7 controls.
When installing the K001D8395, disconnect power, move wiring harnesses and terminal connections one-to-one from the old board, and follow the service manual for the exact operator model to transfer settings. After installation, reprogram any wall stations, keypads, or remote controls as required, verify door limit settings and force, and test all entrapment protection devices. The L5 platform supports monitored safety inputs to meet UL 325 requirements; use only compatible LiftMaster photo eyes/edges and verify proper operation before returning the door to service. For compatibility, match by operator model and logic platform; this replacement logic board is designed for select LiftMaster commercial trolley, hoist, and jackshaft operators that specify an L5/Logic 5.0 control board.