The LiftMaster 050ACTBMC is an OEM replacement circuit board (logic board) for select LiftMaster AC garage door openers that feature built‑in MyQ Wi‑Fi and Security+ 2.0 radio technology. Designed to restore full functionality when the original control board has failed, this assembly manages the opener’s motor control, safety sensor monitoring, lighting, Wi‑Fi connectivity for the MyQ app, and pairing with Security+ 2.0 remotes and keypads. It is intended for compatible North American residential AC openers with integrated Wi‑Fi; it is not interchangeable with DC motor models or non‑Wi‑Fi units. Always verify compatibility by matching your opener’s model documentation and the part number printed on the existing board (050ACTBMC).
When installed, the 050ACTBMC supports remote monitoring and control via the MyQ app after connecting to a 2.4 GHz home network, and maintains encrypted rolling‑code operation with Security+ 2.0 accessories. Installation requires disconnecting power, transferring terminal wires to the same positions on the new board, mounting the board, and then reprogramming travel limits and force per the opener manual. Afterward, re‑pair handheld remotes, keypads, and any MyQ integrations using the Learn function, and confirm proper alignment and operation of photoelectric safety sensors. For safety, do not service the opener while powered, observe ESD precautions, and note that compatible openers must use functioning safety sensors (not for pre‑1993 systems).
| Manufacturer | Compatible Model Numbers |
|---|---|
| LiftMaster Models | |
| LiftMaster | 8155W, 81550, 8164W, 8165W, 81650, 8355W, 8355W-267, 8365W, 8365W-267, 8365-267, 83650-267, 8557W |
| Chamberlain Models | |
| Chamberlain | B353, B353C, B2202, B2405, C450, C2202, C2405, D2101 |