LiftMaster 41A5021-1M-315 Receiver Logic Board Assembly

The LiftMaster 41A5021-1M-315 Receiver Logic Board Assembly is an OEM replacement control board for select LiftMaster residential garage door openers built around the Security+ 315 MHz platform. This board manages the opener’s core functions—radio reception, motor control, safety sensor monitoring, and wall control interface—restoring reliable operation when the original logic board has failed. Identified by its purple Learn button and 315 MHz radio, it pairs with compatible Security+ remotes and keypads and is designed to work with photo-eye safety sensors per UL 325 requirements.

Operating on 315 MHz Security+ rolling code technology, the 41A5021-1M-315 is intended for models that use a purple Learn button and compatible transmitters such as LiftMaster 371LM/373LM remotes and 377LM keyless entry. It is not compatible with earlier 390 MHz Security+ units (red/orange Learn button) or newer Security+ 2.0 systems (yellow Learn button). Installation involves unplugging the opener, transferring connectors exactly as removed, and reprogramming remote controls and keypads via the Learn button after power is restored; force and travel settings should be verified and adjusted according to the opener’s manual. For best results, confirm part number compatibility against the opener’s model documentation or the original board label, ensure photo eyes are correctly wired and aligned, and observe electrostatic discharge precautions during handling. This factory board is suited for residential applications where a direct, like-for-like replacement part is required.