LiftMaster 841LM Automatic Garage Door Lock - Smart Lock for Secure Garage

Smart security that locks with every door move

As families seek seamless, reliable garage protection, the LiftMaster 841LM Automatic Garage Door Lock offers hands-free control that works with select LiftMaster openers. The lock operates in perfect cadence with your door, so it locks when the door closes and unlocks as you open it, helping you maintain a consistent security routine.

In addition to automatic operation, the lock pairs with the myQ app for smartphone monitoring. You can verify the door status from anywhere, receive alerts, and feel confident that your garage is secure when you're away. The audible engagement of the lock provides a tangible signal that the door is closed and secured, while the 12V deadbolt design adds a robust line of defense against misalignment or wind-driven movement.

Key benefits at a glance

• Automatic locking and unlocking synchronized with door movement
• MyQ app monitoring for remote visibility and peace of mind
• Audible lock engagement confirms secure door status
• Designed for use with select LiftMaster openers for a seamless upgrade
• Option to add a second lock on the opposite side for enhanced protection in extreme weather

Compatibility and installation notes

• Model 841LM 12V lock compatible with 8550WL, 8587WL, 8360WL, 8500W openers
• Not interchangeable with the 24V lock used on residential jackshaft openers 3800, 3900 and 8500

Real-life scenarios illustrate how the 841LM can fit into daily routines. For instance, you can leave for work with the confidence that the door locks automatically behind you. If you’re heading out for errands, you can check status via the app and receive a quick confirmation. In homes prone to strong winds, adding a second lock on the opposite side can offer extra defense against drafts and forced entry. While the 841LM is designed to integrate smoothly with your opener, results can vary with installation specifics, so consider it a potential upgrade rather than a guaranteed outcome.