The LiftMaster 047DCT is an original equipment replacement receiver/logic circuit board for select LiftMaster DC motor garage door openers featuring Security+ 2.0 technology. This control board manages the opener’s core functions—including motor operation, soft start/stop travel, lighting control, and monitoring of safety reversing sensors—while providing integrated Security+ 2.0 radio reception for modern remotes and keypads. Designed for residential chain-drive and belt-drive DC units with a yellow LEARN button, it supports tri-band Security+ 2.0 rolling code radio (310/315/390 MHz) to help maintain dependable remote range and interference resistance. Use it as a direct replacement part to restore proper functionality when the original board has failed or is reporting persistent diagnostic errors.
Installation requires disconnecting power to the opener, transferring all low-voltage wires to the matching terminals on the new board, and reinstalling the control head cover. After replacement, the opener’s travel and force must be reprogrammed, and all remote controls, wireless keypads, and wall consoles must be re-learned using the LEARN button on the head unit. The 047DCT works with compatible Security+ 2.0 accessories and standard monitored photo eyes required for UL 325 compliant operation; it is not intended for older AC openers or non–Security+ 2.0 platforms. For best results, confirm compatibility by matching the part number in your owner’s manual or on the original board and verify your opener uses a DC drive with a yellow LEARN button.