Liftmaster K76-34697 APS Encoder, 24V, CSL24 and HCT Commercial Operators

Liftmaster K76-34697 APS Encoder, 24V, CSL24 and HCT Commercial Operators

The LiftMaster K76-34697 is a 24V APS encoder kit used on select LiftMaster commercial gate operators that rely on position feedback for proper travel control. The encoder helps the operator know where the gate or overhead unit is during movement, allowing the control system to manage stopping points and travel logic.

A failed or damaged encoder can cause travel faults, inaccurate positioning, unexpected stops, or repeated setup problems depending on the operator. Before replacing it, the technician should inspect the encoder wiring, connector, mounting, and operator diagnostics.

This part should not be confused with a limit nut, mechanical limit switch, or main control board. The correct part depends on the operator family and generation, so model verification is important.

Compatible With

Commonly associated with select LiftMaster commercial slide and overhead gate operator applications, including:

• CSL24 slide gate operators
• CSL24UL slide gate operators
• CSL24U / CSL24UL variants where K76-34697 is shown in the parts diagram
• HCTDC overhead gate operators
• HCTDCUL overhead gate operators
• Select HCT commercial overhead gate applications when confirmed by parts diagram

Also Known As / Related Part Numbers

• K76-34697
• 76-34697
• LM-K76-34697
• LiftMaster K76-34697
• APS encoder
• 24V APS encoder
• Absolute Position Sensor encoder
• CSL24 encoder
• HCTDC encoder

Features & Specifications

Technician Note

Encoder-related errors should be diagnosed with the operator manual. Harness damage, loose connectors, board faults, or mechanical travel issues can create symptoms similar to a bad encoder.

Before Ordering

• Confirm the operator model and generation.
• Match the original encoder or parts diagram to K76-34697.
• Inspect encoder wiring, connector pins, and mounting position.
• Check for gate binding, travel obstruction, or setup errors.
• Follow the operator manual for reset or setup after replacement.

Important Ordering Warnings

• Not a standard limit switch.
• Not a universal encoder for all LiftMaster operators.
• Fault codes should be diagnosed before replacing parts.

Professional Advisory

Do not bypass travel feedback or safety devices to make the operator run. If the gate moves unpredictably or will not complete setup, stop operation and have the system inspected.

Product Questions & Answers

What is the K76-34697 APS encoder?

It is a 24V Absolute Position Sensor encoder kit used to provide position feedback on compatible LiftMaster commercial slide and overhead gate operators.

Which models commonly use K76-34697?

It is commonly associated with LiftMaster CSL24 / CSL24UL slide operators and HCTDC / HCTDCUL overhead gate operators when the parts diagram confirms this encoder.

What does the encoder affect?

The encoder helps the operator track travel position. A faulty encoder can contribute to travel errors, inaccurate stopping, or operator faults depending on the model.

Is this a limit switch?

No. It is an APS encoder, not a mechanical limit nut or standard limit switch. Do not substitute a limit switch part for this encoder.

What should be checked before replacing the encoder?

Check wiring, connectors, physical mounting, board faults, and any gate binding or travel obstruction before replacing the encoder.