LiftMaster K94-38028 Power Board Identification Resistor — 1 HP

The LiftMaster K94-38028 is the power-board identification resistor listed for a 1 HP configuration. It is a specific service component for the documented power-board arrangement, not a general replacement resistor selected from a photograph. Match the operator, motor rating and board service information before ordering this small but configuration-dependent electrical part. Select the replacement by the complete part number and the installed equipment configuration. A similar photograph or a shared LiftMaster brand name does not establish interchangeability. Confirm the applicable service drawing before ordering so the repair addresses the correct component and its related mounting, connection and operating requirements.

Compatibility — Models, Versions and Exclusions

Identify the Assembly and Plan the Repair

Identification components must correspond to the equipment configuration the control system was designed to recognize. Establish the existing motor nameplate rating and power-board reference before replacing a missing or damaged resistor. Do not fit a different identification component to mask an overload, change the apparent horsepower or avoid diagnosing a control fault.

The ordering description identifies the intended horsepower configuration, but it does not provide an independently verified resistance, tolerance or wattage for selecting a loose electronic substitute. Ask the supplier to confirm the current service item and its application. Preserve the original wiring arrangement and inspect nearby connectors for damage or corrosion during the repair.

An electrical symptom does not identify the failed component by itself. Have qualified service personnel inspect the supply, wiring, connections and equipment condition before replacing parts. Record existing labels and terminal references with power safely isolated. A replacement should restore the documented circuit arrangement; it should not be used to change operating voltage, defeat a protective function or compensate for a mechanical load that the equipment cannot safely move.

Specifications and Product Identification

Before Ordering

• Photograph the motor and operator nameplates.
• Record the installed power-board part number.
• Confirm that the approved service list calls for K94-38028.
• Obtain the correct service procedure rather than guessing resistance from the horsepower rating.

Package Contents and Separate Requirements

This listing identifies the power-board identification resistor. It is not a replacement motor, complete power board or horsepower conversion package. Confirm whether the current service item includes any connector or lead arrangement needed for the specific board; unrelated electronics and wiring repairs remain separate requirements.

Safety Warnings — Read Before Installation or Service

• WARNING: Electrical service can expose hazardous voltage and moving equipment. Use qualified service personnel and electrical personnel where required.
• Disconnect every applicable mains, battery and auxiliary supply before work. Follow the equipment instructions for stored energy and safe isolation.
• Do not bypass grounding, overload protection, monitored safety devices or fire-control functions to make the equipment operate. Diagnose the underlying fault.
• Restore covers and wiring protection, then complete the model-specific functional and safety checks before returning the installation to normal use.

Related Products and Important Differences

• CPS-U monitored photo eyes — separate protection devices for approved commercial-door controls; match the operator and environment.
• TDC12X1BMC MAXUM trolley operator — a complete-operator comparison, not evidence that this legacy service part fits MAXUM.

Frequently Asked Questions

Is the resistance value the same as 1 HP?

No. The horsepower designation identifies an equipment configuration, not an electrical resistance value. Use the specified service component.

Can this increase motor horsepower?

No. A configuration resistor does not increase motor capacity or establish a safe equipment conversion.

Is it interchangeable with K94-38006?

Do not assume so. That separate reference is identified for a 1/2 HP configuration.

Does this include the power board?

No complete power board is identified by this offer. Confirm the small-part package and required board application before ordering.

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.