LiftMaster K1D8059-1CC Main Control Board — CSL24VDC / CSW24VDC

The LiftMaster K1D8059-1CC is the main control-board service reference identified for CSL24VDC and CSW24VDC commercial gate operators in LiftMaster’s board-compatibility bulletin. It must be selected by the complete operator model, installed wiring and board generation. Older CSL24V and CSW24V equipment requires the documented conversion procedure rather than a simple board swap. For paired gates, the bulletin also requires matching board versions across both operators, making the companion gate part of the purchasing decision.

Compatibility — Models, Versions and Exclusions

Check Both the Board Generation and the Wiring

A replacement board cannot be selected from the enclosure shape or a shortened model name. Photograph the main board, expansion board, operator label and power connections before ordering. If one side of a paired entrance has already been repaired, inspect that side too; an apparently identical gate may now contain a different electronics revision.

The manufacturer’s legacy conversion includes a specific DC-power harness polarity change and warns against confusing those wires with the battery wiring. This is qualified service work, not a general instruction to reverse connectors. Boards supplied after the bulletin’s stated October 2015 change also require monitored safety sensing. Have the installer evaluate the complete conversion and protection requirements before deciding that a board-only purchase is sufficient.

Specifications and Product Identification

Before Ordering

• Record the full model suffix and existing board numbers.
• Check both operators if the entrance has two coordinated gates.
• Identify whether this is a like-for-like replacement or a documented legacy conversion.
• Confirm the expansion board, harness work and approved monitored protection required.

Package Contents and Separate Requirements

This offer identifies the main control board. Do not assume that a matching expansion board, conversion hardware, batteries, harnesses or safety sensors are included. Confirm the current service-kit inventory and revision with the supplier. A parts diagram showing related components describes their relationship, not necessarily the contents of a single replacement-board carton.

Safety Warnings — Read Before Installation or Service

• WARNING: A moving gate and exposed electronics can cause serious injury. Installation and service require a qualified gate-systems technician.
• Isolate AC power, batteries and any solar supply as applicable, and secure the gate against unexpected movement before work begins.
• Keep people clear of the gate and drive during supervised testing. Never bypass required entrapment-protection devices or increase force to overcome a mechanical fault.
• Restore all covers and guards, then verify travel endpoints, reversal and every required safety device before returning the gate to normal operation.

Related Products and Important Differences

• LMRRUL monitored photo eye — a separate protection option only where the exact operator and control revision approve it; not a universal legacy retrofit.
• LMWEKITU monitored wireless edge kit — a separate edge communication system for approved controls and resistive edges; not a replacement for this mechanical or electrical service part.

Frequently Asked Questions

Can it replace the older board without wiring changes?

Not on the older CSL24V / CSW24V models covered by the conversion bulletin. The documented procedure must be followed.

Can I update only one side of a dual gate?

Do not mix the old and new board generations described in the bulletin. Have both operators evaluated together.

Is the expansion board included?

It is a separate service reference unless the supplier explicitly offers a combined package.

Will this add the capabilities of every newer UL operator?

No. A replacement board does not establish a complete newer-model conversion or universal accessory compatibility.

Need Help Confirming the Right Product?

Contact Garage-DoorParts.com before ordering. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.