Liftmaster 50DCTTWFLK 315MHz Security+ 2.0 w/ Lock Receiver Logic Board WiFi MyQ
The LiftMaster 050DCTBFLKMC is a DC receiver logic board for select Wi-Fi enabled LiftMaster and Chamberlain residential garage door openers. It is used on lock-capable Security+ 2.0 openers with a yellow learn button and integrated Bluetooth support. The logic board is the main electronic control center for the opener. It manages radio reception, accessory inputs, travel programming, motor control communication, lighting functions, myQ connectivity, and lock-related control functions where equipped. This part is often ordered when the opener has confirmed board failure, will not accept remotes, has communication issues, will not complete setup, or has damaged terminals. Because Chamberlain Group used several similar 050DCT board families, this board should be ordered only when the opener model and original board number support the lock-capable 050DCTBFLKMC family.
Features and Specifications
| Manufacturer | LiftMaster / Chamberlain Group |
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| Product Type | Receiver logic board |
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| Part Number | 050DCTBFLKMC / 050DCTBFLK |
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| Application | Main control and radio receiver board |
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| Compatible Operator Type | Select DC Wi-Fi chain and belt drive openers |
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| Security Technology | Security+ 2.0 yellow learn button |
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| Connectivity | myQ Wi-Fi and Bluetooth enabled on supported models |
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| Lock Capability | For lock-capable opener platforms |
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| Notes | Board layout and full part number must match the original opener requirement |
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Compatible With
- LiftMaster 8550WLB Wi-Fi Battery Backup DC Belt Drive Garage Door Opener
- LiftMaster 8550WLB DC Battery Backup Belt Drive Wi-Fi Garage Door Opener
- LiftMaster WLED DC Battery Backup LED Wi-Fi Garage Door Opener
- Select Chamberlain Group DC Wi-Fi lock-capable belt drive openers using the same board platform
- Select DC chain or belt drive openers that list 050DCTBFLKMC, 050DCTBFLK, 050DCTWFLK, or 050DCTBLK in the parts diagram
- Not for non-lock 050DCT boards, AC motor boards, or older Security+ systems unless the parts diagram confirms the board
Also Known As / Related Part Numbers
- 050DCTBFLKMC
- 050DCTBFLK
- 050DCTWFLK
- 050DCTBLK
- 50DCTBFLK
- 50DCTWFLK
- 050DCTBLKMC
- DC Wi-Fi lock receiver logic board
- Security+ 2.0 yellow learn button logic board
Technician Note
Do not match this board by color or shape only. Confirm the original board number, learn button color, lock terminals, motor type, and opener model. If a board failed because of surge damage, inspect the power supply, wall control wiring, safety sensor wiring, and accessories before installing the new board.
Before Ordering Checklist
- Confirm the opener is a DC motor Wi-Fi model
- Confirm yellow learn button Security+ 2.0 technology
- Confirm automatic lock capability if the opener uses a garage door lock
- Compare the full original board number and terminal layout
- Plan to reprogram remotes, keypads, myQ, travel, and force settings
Important Ordering Warnings
Logic board replacement involves low-voltage accessory wiring and opener setup. If there is visible board damage, burning, repeated fuse failure, or unsafe door movement, have the opener inspected by a qualified garage door technician before use.
Professional Advisory
This board should not be used as a catch-all replacement for every 050DCT or 050ACT board. Non-lock, AC, non-Bluetooth, and different lighting platform boards can look similar but use different electronics and firmware.
Product Questions and Answers
Which opener models are confirmed for 050DCTBFLKMC?
The strongest confirmed LiftMaster compatibility includes 8550WLB and WLED family openers that use the DC Wi-Fi lock-capable Bluetooth receiver logic board platform.
Is this board compatible with yellow learn button remotes?
Yes, this board is part of the Security+ 2.0 yellow learn button family. It is not for older purple, red/orange, green, or DIP-switch radio systems.
What makes this board lock-capable?
Lock-capable boards are designed for openers that support a compatible automatic garage door lock. A non-lock board or non-lock opener may not have the same terminals, firmware, or wiring layout.
Can this replace every 050DCT board?
No. Similar 050DCT boards can differ by Wi-Fi, Bluetooth, battery backup, DC motor type, lighting, and lock capability. Match the full board number and opener model before ordering.
What has to be done after replacing the receiver logic board?
Remote controls, keypads, myQ/Wi-Fi setup, travel limits, force settings, and safety reversal tests may need to be completed again after board replacement.
