LiftMaster Q401 Omni 1 HP Board — Legacy Gate-Operator Service Part

The LiftMaster Q401 is the Omni 1-horsepower board identified in documented legacy CSW200UL and SL3000UL gate-operator parts lists. It is a separate service board within the appropriate 1 HP electronics arrangement, rather than the operator’s main OmniControl board. Select Q401 by the full operator model, motor configuration, installed board and wiring diagram. This distinction matters when diagnosing a gate that will not run: replacing the wrong board can leave the original fault unresolved, and a 1 HP board alone does not convert a lower-horsepower operator into a higher-capacity machine.

Compatibility — Models, Versions and Exclusions

Identify the Board Before Choosing the Repair

The legacy parts list separates the 1 HP board, main control board and motor harness. Have the technician identify which component is involved in the fault before ordering. A motor that does not start may also have a supply, connection, motor or mechanical problem. Record the symptoms and inspect the power path rather than assuming every drive-related problem requires the same circuit board.

Photograph the board labels, operator nameplate and existing connections while preserving the wiring information needed for service. Check whether previous repairs changed the electronics or motor arrangement. Restore the specified mounting, insulation and connections using the exact operator diagram. After replacement, complete the required operating and safety tests; a successful first opening cycle is not enough to establish that the entire system is ready for normal use.

Specifications and Product Identification

Before Ordering

• Record the complete operator model and motor configuration.
• Confirm Q401 in the applicable manufacturer parts list.
• Distinguish the 1 HP board from the main board and motor harness.
• Have electrical faults and mechanical gate resistance evaluated before replacement.

Package Contents and Separate Requirements

This offer identifies the Q401 Omni 1 HP board. A main control board, motor, motor harness, surge suppressor, enclosure and complete operator are not promised as included. Confirm the current service package for any supplied mounting or connection pieces. The surrounding parts drawing shows separate components of the operator; it does not establish a combined electronics kit or a conversion package for a different horsepower configuration.

Safety Warnings — Read Before Installation or Service

• WARNING: Gate-operator electronics can contain hazardous electrical energy and command unexpected movement. Diagnosis and board replacement require a qualified gate-systems technician.
• Disconnect all applicable power sources and secure the gate before opening the electronics enclosure or changing connections.
• Do not improvise wiring, bypass protection devices or increase force to overcome a binding gate. Correct the underlying fault before returning the operator to service.
• Restore covers and verify travel endpoints, reversal and every required entrapment-protection device before normal operation resumes.

Related Products and Important Differences

• LMRRUL monitored photo eye — a separate protection option only where the installed control system expressly supports it; not a universal legacy retrofit.
• LMWEKITU monitored wireless edge kit — a separate edge communication system requiring approved controls and compatible edges; Q401 alone does not establish compatibility.

Frequently Asked Questions

Is Q401 the main OmniControl board?

No. The cited parts list identifies the main board separately from the Omni 1 HP board.

Will it upgrade a half-horsepower operator to 1 HP?

No. This service board alone does not establish an approved motor or capacity conversion.

Does it include the Q407 motor harness?

The harness is separately identified and is not promised with this board-only offer.

Will it fit every CSW200 or SL3000 operator?

No. Match the exact generation, motor configuration and installed electronics.

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.