LiftMaster 841LM Garage Door Lock

Deadbolt Security Lock for LiftMaster Garage Door Openers

The LiftMaster 841LM is an automatic garage door lock that enhances perimeter protection by reinforcing the door with a powerful deadbolt every time it closes. Designed for seamless integration with compatible LiftMaster openers, this lock engages and disengages in sync with the motorized cycle, creating a secure, tamper-resistant barrier. When paired with two locks, it meets two-point locking system requirements and has been tested to satisfy hurricane-ready standards for added structural strength.

Key Features

• Automatic Lock Engagement - Activates and disengages with each open/close cycle
• myQ Compatibility - Provides remote lock status and alerts via LiftMaster's myQ app
• Audible Feedback - Clicking sound confirms the deadbolt has been engaged
• Security Reinforcement - Adds physical protection to sectional garage doors
• Dual-Lock Capable - Supports two-point locking for added storm resilience
• Manual Override - Built-in release lever for manual operation during power outages
• OEM Integration - Designed for LiftMaster models with Security+ 2.0 and Security Shield

Technical Specifications

• Model: 841LM
• Part Number: 001D8875
• Lock Type: Electromechanical deadbolt
• Voltage: Low-voltage, powered via door opener
• Wiring Length: 33 ft (included)
• Compatible Openers: WLED, 8550WLB, 8360WLB, 8580WLB, 8587W
• Mounting Type: Track-mounted (sectional doors only, torsion assemblies required)
• Manual Release: Slide-to-open disengagement for emergency access
• Max Locks per Door: 2 (dual-lock configuration supported)
• Certifications: Engineered and tested to meet hurricane reinforcement standards

Conclusion

The LiftMaster 841LM is an essential add-on for garage owners who prioritize automated security and peace of mind. Ideal for environments that demand higher structural integrity or remote access control, it reinforces your garage door with every close cycle—without the need for manual locking. For best results, consult your door and opener manual to verify compatibility.