LiftMaster 41AC050-2M Receiver Logic Board Assembly

The LiftMaster 41AC050-2M Receiver Logic Board Assembly is an OEM replacement control board for select LiftMaster residential garage door openers. This board serves as the opener’s “brain,” integrating the radio receiver and motor control to operate the door, manage the courtesy light, interface with photoelectric safety sensors, and store remote/keypad codes using Security+ rolling code technology. The 41AC050-2M version is associated with Security+ 315 MHz systems and is typically found in operators that have a purple Learn button; it works with compatible 315 MHz accessories such as LiftMaster remotes 371LM/373LM and keyless entry 377LM. Replace your existing board only if your opener’s manual, parts label, or original PCB number specifies 41AC050-2M, and note that it is not intended for newer Security+ 2.0 (yellow Learn button) models or older 390 MHz-only systems.

Installation involves disconnecting power, removing the light lens/cover, and swapping the harnesses and mounting points from the original board to the new assembly; observe electrostatic discharge precautions and handle connectors carefully. After installation, you must reprogram all remotes and keypads via the Learn button and verify/adjust travel limits and force settings per the opener’s manual. For safe operation, ensure the photo eyes are correctly wired and aligned—units will not run normally if the safety reversing sensors are misaligned or disconnected. This genuine LiftMaster replacement part is ideal for restoring reliable operation to compatible AC-powered chain- or belt-drive openers that originally shipped with the 41AC050-2M logic board.