Liftmaster K76-34644, APS ENCODER, 24V
The LiftMaster K76-34644 is a 24V APS encoder assembly used for gate position feedback on select LiftMaster swing gate operators. APS stands for Absolute Position Sensor. The encoder helps the control board understand where the gate arm is during travel so the operator can learn limits, ramp properly, and stop in the correct open and close positions.
Encoder problems can show up as failed limit learning, inconsistent stopping points, unexpected reversals, or movement faults. However, similar symptoms can also be caused by wiring, board, gearbox, gate binding, or setup issues, so the encoder should be diagnosed before replacement.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster / Chamberlain Group |
| Product Type | APS encoder / absolute position sensor |
| Part Number | K76-34644 |
| Voltage | 24V |
| Application | Gate position feedback and limit learning |
| Compatible Operator Type | Swing gate operator |
| Notes | Verify voltage and parts diagram |
Compatible With
Common Compatible Models
- LiftMaster CSW24V / CSW24VDC style swing gate operators where listed
- LiftMaster CSW24U / CSW24UL style swing gate operators where listed
- LiftMaster RSW12V / RSW12VH references where the 24V APS encoder is specified
- LiftMaster RSW12U / RSW12UL style swing gate operators where the parts diagram calls for K76-34644
Important Compatibility Notes
- Use only where a 24V APS encoder is specified
- Do not confuse with 12V APS encoder kit K76-34697-3
- Confirm connector, harness, and mounting style before ordering
Also Known As / Related Part Numbers
- K76-34644
- LM-K76-34644
- LIF-K76-34644
- 04 K76-34644
- APS Encoder 24V
- APS Encoder w/cable
- Absolute Position Sensor 24V
Technician Note
Encoder replacement should be followed by the required limit or travel setup procedure for that operator. If travel cannot be learned after replacement, inspect wiring, board inputs, and mechanical gate movement.
Before Ordering
- Confirm the operator calls for a 24V APS encoder
- Compare connector and harness style
- Check for damaged wiring before replacing the sensor
- Be prepared to relearn limits or travel after installation
Professional Advisory
If the gate moves unpredictably, hits stops, or will not complete setup, secure the system and have a qualified gate technician diagnose the position-sensing and safety circuits.
Important Ordering Warnings
- K76-34644 is not the same as 12V encoder kit K76-34697-3
- Do not replace the encoder before checking for broken wires or gate binding
Product Questions & Answers
What does the K76-34644 APS encoder do?
It provides position feedback to the operator control board so the swing gate operator can learn and control travel.
Which operators commonly use K76-34644?
It is commonly associated with select CSW24 and RSW12 style LiftMaster swing gate operators where a 24V APS encoder is specified.
Is K76-34644 the same as K76-34697-3?
No. K76-34644 is a 24V encoder assembly, while K76-34697-3 is commonly listed as a 12V APS encoder with harness.
What symptoms can point to an APS encoder problem?
Symptoms can include failed travel learning, incorrect stopping, position faults, or inconsistent gate movement.
Does the operator need setup after replacement?
Yes, the operator may need a limit or travel relearn procedure after the encoder is replaced.
