LiftMaster 041B8861 Travel Module Absolute Encoder

The LiftMaster 041B8861 Travel Module (Absolute Encoder) is an original OEM replacement position-sensing module used in select LiftMaster and Chamberlain residential garage door openers with DC motors. This absolute encoder monitors door travel and feeds precise position data to the logic board, enabling accurate open/close limits, soft start/stop, and consistent operation on compatible Security+ 2.0 openers. Replacing a worn or failed encoder can resolve issues such as lost travel limits, unexpected stopping, or the need to continually reprogram the opener.

Designed for specific models that use an absolute encoder rather than mechanical limit switches, the 041B8861 installs inside the motor head and connects to the control board via a keyed harness. Installation typically involves removing the light lens or cover, disconnecting power (and any backup battery), swapping the module, and then reprogramming travel limits and force settings per the opener’s manual. For compatibility, confirm your opener’s exact model and parts diagram to verify 041B8861 is specified, as it is not interchangeable with other encoder or limit assemblies. Use only on compatible residential LiftMaster/Chamberlain units and follow all safety instructions when servicing powered door equipment.