LiftMaster 41DJ001B Logic Board Assembly

The LiftMaster 41DJ001B Logic Board Assembly is an original equipment replacement control board designed for select LiftMaster door operators that specifically call out part 41DJ001B in their service documentation. This board governs the core functions of the operator, including motor drive control, limit and travel logic, safety sensor monitoring, radio control interface, and accessory inputs. Installing a new 41DJ001B restores reliable operation when a failed or damaged control board causes symptoms such as non-response, error indications, or erratic performance. It is intended for use only with compatible LiftMaster models; it is not a universal board.

This factory assembly comes ready to swap in place of the original logic board in the designated operator. Typical connections accommodated by this board include terminals for wall control stations, monitored photo-eyes or other required entrapment protection devices, external control inputs, and accessories, with onboard status indicators and diagnostics as specified in the operator’s manual. For installation, disconnect power, observe ESD precautions, label and transfer each wire to the matching terminal, and secure the board per the manufacturer’s instructions. After replacement, reprogram travel limits and any accessories or remotes, and verify proper operation of safety features in accordance with UL 325 guidelines and the specific LiftMaster model’s instructions. Always confirm compatibility by checking your operator’s model/serial label and parts list for 41DJ001B or an approved supersession before ordering.