LiftMaster K1D8389-1CCMC Main Control Board for Compatible DC Pad-Mount Gate Operators

The LiftMaster K1D8389-1CCMC is a replacement main control board for specified LiftMaster DC pad-mount swing and slide gate operators. It is intended for a diagnosed control-board replacement in a compatible system. The supplier identifies this service part for applicable operators manufactured after 2016. Documented application examples include the CSL24U slide-gate and CSW24U swing-gate systems, subject to the correct production revision and approved service replacement. Before ordering, identify the installed board and control configuration so the repair addresses the diagnosed fault and preserves the required safety-device functions.

Compatibility — Models, Versions and Exclusions

Replacing the Control Board Without Overlooking the Original Fault

A gate that will not run does not automatically have a failed main board. Supply problems, damaged field wiring, an actuator or motor fault, and a safety-device fault can produce similar symptoms. Replacing the board without identifying the cause can leave the original problem unresolved. A technician should use the operator diagnostics and inspect the connected circuits before selecting this service part.

The printed board reference, service-kit order number and operator model serve different purposes. Photograph all three where available. If the housing has been retained through an earlier electronic upgrade, its exterior label alone may not describe the controls now installed. Record existing accessories and safety interfaces so the replacement plan includes their setup and testing.

Product Identification

Compatibility and Selection

LiftMaster parts documentation identifies the K1D8389-1CC board in CSL24U slide-gate and CSW24U swing-gate systems. Match the complete operator model, production revision and existing board reference before ordering. Other models require confirmation from their own parts diagrams.

The similarly numbered K1D8388-1CCMC serves linear-actuator applications. Board appearance or a shared LiftMaster brand does not establish interchangeability. An older operator may require a manufacturer-defined upgrade and additional monitored protection instead of a board-only replacement.

Before Replacing the Board

• Have the power supply, batteries, wiring and connected safety devices checked during diagnosis.
• Record the exact operator model, manufacturing date and board label.
• Confirm the required board revision and any upgrade components in the applicable service instructions.

Frequently Asked Questions

Does this replace every LiftMaster gate control board?

No. Use it only where the exact operator documentation specifies this board or an approved replacement.

Is this a complete gate operator or safety-upgrade package?

This listing identifies the main control-board service part. Confirm any separately required sensors, harnesses or upgrade components before ordering.

Safety Warnings — Read Before Installation or Service

• WARNING: Unexpected gate movement and electrical energy can cause serious injury or death. Service requires a trained gate-systems technician.
• Disconnect and secure every applicable AC, battery and solar power source before touching wiring. Turning off AC alone may leave a battery-backed system energized.
• Do not bridge a safety input or defeat a fault indication to make the gate run. Keep the gate out of normal service until the cause is corrected.
• Keep the travel area clear during setup. Verify limits, force response and every required monitored protection device before restoring automatic operation.

Related Products and Important Differences

• LiftMaster linear-actuator main control board — compare the separate K1D8388 family when the installation uses an LA-series actuator; this is not an interchangeable pad-mount board.
• LMWEKITU monitored wireless edge kit — a safety-edge communication option to check against the exact operator manual when reviewing the installation’s protection devices.

More Questions Before Ordering

Will my current settings and remotes automatically transfer?

Plan for the setup and programming required by the replacement-board instructions. Do not assume saved travel settings, accessories or remote programming transfer to the new board.

Can I order using only the board photograph?

A photograph helps, but the operator model, manufacture date and readable part labels are needed to distinguish revisions and approved replacements.

Need Help Confirming the Right Part?

Contact Garage-DoorParts.com before ordering. Send the full operator model, readable part labels and photographs of the installed assembly. Include dimensions or the control-box model where relevant. We can help compare the listing with the information you provide; final installation suitability should be confirmed by the servicing technician.