May be used in two different ways: as an OPEN only control (all LiftMaster operators) or as an OPEN/CLOSE control (only LiftMaster operators with types B2 and S2 control wiring).
In the latter case pulling the cord will open a fully closed door close a fully opened door and reverse a closing door.
Pulling the cord whlie the door is opening will either have no effect (type B2 wiring) or will stop the door (Solid State Logic Control Board).
OPEN only (all LiftMaster operators) or SAFETY only (LiftMaster operators with type B2 C2 L2 T T1 or TS control wiring) after vehicle passes over treadle.
The weight of the vehicle compresses an electric switch which sends an open signal to the door.
Requires a 2-wire connection to the operator but does not require power to function
Smooth Start/Stop Operation - DC high-efficiency motor and gearbox provides the power needed and smooth start and stop to reduce wear-and-tear on your door and operator.
Faster Speed - Average of 12” per second opening on sectional doors.
Battery Backup Option - (battery backup kit sold separately).
Floor-Level Wall Controller - 4-line LCD display gives you access to programming troubleshooting and diagnostics at floor level saving time and money.
Wi-Fi® and myQ® - Easily connect to myQ Facility via Wi-Fi for visibility into what is happening at your door and control it from your web browser; no need for additional hubs or accessories. Know what accessories activate the door (remote transmitter keypad etc.)
For use with various LiftMaster® Belt Drive and Chain Drive Garage Door Openers featuring myQ® technology dual light lenses and are not equipped with a video camera; manufactured after 2021 only
This replacement kit is compatible with the following models: 84501 84501-267 84602