LiftMaster K20-1100C-2P Replacement Motor — 1 HP, 115/230V, Single-Phase C-Face

The LiftMaster K20-1100C-2P is the source-listed 1-horsepower, 115/230V single-phase replacement motor with a C-face mounting arrangement. The complete motor reference matters: a base-mounted motor or another 1 HP unit is not automatically an equivalent replacement. Select it against the actual operator service information, original motor label, shaft connection and supply configuration. This motor is a repair component for an approved installation, not permission to change operator horsepower or connect a dual-voltage motor without following its specified lead arrangement.

Compatibility — Models, Versions and Exclusions

Match the Mounting and Motor Wiring Before Ordering

Record the full motor label and operator identification, then compare the flange, shaft connection and electrical arrangement with the correct service drawing. The C-face designation is an important mounting distinction, but it does not by itself establish every dimension or connection. Equipment that has been modified during earlier repairs should be assessed against its actual installed configuration.

Have qualified personnel inspect the supply, motor-control circuit, capacitor where fitted and mechanical load before replacing the motor. A drive that binds or a brake that does not release can produce symptoms that resemble motor failure. Restore the specified motor configuration and connected drive components; do not change pulleys or wiring by guesswork to make an unsuitable replacement operate.

Specifications and Product Identification

Before Ordering

• Record the operator model and full existing motor label.
• Verify K20-1100C-2P and C-face mounting in the service information.
• Confirm actual supply and the manufacturer lead-connection requirements.
• Inspect the connected drive and determine any separately required repair parts.

Package Contents and Separate Requirements

This listing identifies the replacement motor. A pulley, belt, capacitor, brake, gearbox, wiring harness or complete operator is not promised as included. Confirm the current supplier package against the repair requirements. A parts illustration may show the motor beside these components without including them in the motor carton. Retain only hardware that the service instructions permit to be reused and that the technician finds serviceable.

Safety Warnings — Read Before Installation or Service

• WARNING: Motor replacement exposes hazardous voltage and moving machinery. Use qualified operator-service and electrical personnel.
• Disconnect all applicable power and secure the door or gate before disturbing the drive. Follow the required capacitor and stored-energy precautions.
• Do not connect unidentified leads, infer wiring from color alone or substitute an unapproved mounting or voltage configuration.
• Restore guards and verify motor direction, travel, reversal and all required protection functions before normal use.

Related Products and Important Differences

• CPS-U monitored commercial photo eyes — a separate protection component for approved operators and environments; not supplied with this mechanical accessory.
• TDC12X1BMC MAXUM trolley operator — a complete-operator comparison; verify accessory selection against its own documentation.

Frequently Asked Questions

Is this a three-phase motor?

No. The source identifies a single-phase motor.

Does C-face mean any 1 HP motor will fit?

No. Verify mounting, shaft, electrical and operator-specific requirements.

Can I change between 115V and 230V without checking the diagram?

No. Follow the supplied motor nameplate and manufacturer connection instructions.

Is this an operator horsepower upgrade kit?

No. It is a replacement motor; no capacity conversion is established.

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.