The LiftMaster K03-8024-D Contactor, 24V, Reversing is a genuine OEM replacement assembly used in select LiftMaster commercial door and gate operators to control motor direction for Open and Close functions. This reversing contactor uses a 24-volt control coil and consists of interlocked forward/reverse contact sets that safely swap motor leads under command from the operator’s control board, delivering dependable direction control in industrial, commercial, and institutional applications. It is designed for operators that require a dedicated reversing contactor to run sectional doors, rolling steel doors, and commercial slide or swing gate systems.
As a direct-fit LiftMaster replacement part, the K03-8024-D helps restore reliable operation when an original contactor has worn or failed. Installation should be performed by a qualified technician following the operator’s wiring diagram and lockout/tagout procedures. Confirm compatibility with your specific operator model and serial range using the official LiftMaster parts list or service manual, as reversing contactor specifications and wiring schemes can vary by platform. The 24-volt control coil is energized by the operator’s control circuit; no programming is typically required beyond verifying correct wiring, interlock operation, and functional testing of open/close directions after installation.