The LiftMaster 41A6102 (also referenced as 041A6102) Power Door Lock is an OEM automatic deadbolt designed for LiftMaster wall-mount jackshaft garage door openers. When the door closes, the lock engages to help secure the door against forced opening; when the opener activates, it automatically releases so the door can move freely. This wired accessory mounts to the door track near the header/flag bracket and interfaces directly with the opener’s control circuitry, providing a synchronized, hands-free locking function. It is commonly used as a replacement part for worn or damaged factory locks on compatible systems and is intended for sectional overhead residential doors.
Based on published compatibility from reputable distributor listings, the 41A6102 Power Door Lock is for LiftMaster wall-mount models such as 3800 and 8500; it is not for trolley-style ceiling openers and is different from the 841LM lock used on 8500W/8500WLA systems. Installation requires mounting the lock so the bolt aligns with the track’s lock slot (or the specified bracket location) and connecting the included wiring to the opener’s designated terminals; follow the opener’s manual for wiring and setup. The accessory operates under the opener’s control and does not rely on radio frequency remotes. For safety, disconnect power before installation, ensure the garage door is properly balanced and in good working condition, and do not use on one-piece or tilt-up doors. Always verify opener model compatibility in the LiftMaster documentation before ordering this replacement lock.