The LiftMaster 41B4375-3 Terminal Block w/ Screws is a genuine replacement wire-connection strip for select LiftMaster and Chamberlain garage door opener logic boards. It provides secure, serviceable screw terminals for low-voltage connections such as wall control, safety reversing sensors, and compatible accessories. If the original terminals on your opener are stripped, cracked, loose, or corroded, this part restores reliable wiring connections and helps eliminate intermittent operation caused by poor terminations.
Designed for openers that specifically call for part number 41B4375-3, this terminal block installs on the control board as the primary landing point for field wiring. Installation typically involves disconnecting power, labeling and transferring each conductor to the matching terminal, tightening the included screws to manufacturer-recommended snugness, and verifying correct polarity for photo-eye leads before testing operation. No programming changes are required after replacement; however, always recheck safety sensor alignment and perform a full safety reversal test per the opener manual. Compatibility is model-dependent, so confirm the part number in your owner’s manual or parts diagram before ordering. Ideal for residential and light commercial applications using LiftMaster/Chamberlain Security+ or Security+ 2.0 style control wiring where this exact terminal block is specified, the 41B4375-3 offers a straightforward, OEM-fit solution for dependable, long-term connections.