The LiftMaster 050ACTWFLK is an OEM replacement logic/control board for select LiftMaster AC chain‑drive garage door openers with integrated myQ smart control. Designed for Security+ 2.0 systems (yellow Learn button), this board restores core opener functions—motor control, safety reversing system monitoring, remote and keypad reception—and enables built‑in Wi‑Fi for myQ app connectivity on 2.4 GHz networks (802.11 b/g/n). The WFLK variant also supports the LiftMaster Automatic Garage Door Lock accessory (model 841LM) on compatible operators, adding an extra layer of door‑position locking when the door is fully closed. Typical applications include residential garage door openers such as AC Wi‑Fi models in the 8164W/8165W family; always confirm compatibility against your opener’s model number and original part label before ordering.
This Security+ 2.0 board maintains encrypted, tri‑band radio reception for reliable operation with compatible LiftMaster remotes and keyless entries, while supporting UL‑required monitored photo‑eye safety sensors. After installation, power must be disconnected before service, and you will need to reprogram travel limits and force settings, re‑learn handheld remotes and wireless keypads, and complete myQ Wi‑Fi setup; if using the 841LM Automatic Garage Door Lock, enroll and test the lock per LiftMaster instructions. Intended for North American AC‑powered openers, this replacement circuit board provides a factory‑spec restoration for Wi‑Fi, myQ, Auto‑Lock readiness, and Security+ 2.0 performance in compatible LiftMaster residential garage door opener models.