LiftMaster K79-15016-1 Commercial Operator RPM Sensor Assembly
LiftMaster K79-15016-1 Commercial Operator RPM Sensor Assembly
The LiftMaster K79-15016-1 is an RPM sensor assembly used in documented LiftMaster commercial door-operator control arrangements. Manufacturer service drawings identify it in several Logic-series operator assemblies, including listed Logic 5 models. It is a speed-feedback service component, not a replacement motor, limit-switch assembly or complete logic board. Confirm the exact operator generation and parts diagram before ordering; a similar symptom or a shared RPM-sensor name does not establish interchangeable fit.
Compatibility — Models, Versions and Exclusions
| Model or selection point | Compatibility requirement |
|---|---|
| Listed Logic 5 electrical assemblies | Match the complete operator model and drawing revision to K79-15016-1. |
| Model T Logic 3 | The referenced manufacturer manual lists this RPM assembly; verify the actual equipment configuration. |
| 041C4398A residential RPM assembly | A different service part; the shared sensing description is not evidence of interchangeability. |
| MAXUM and other platforms | No fit established here; consult the platform-specific service documentation. |
An RPM Fault Requires Diagnosis, Not Just a New Sensor
The control system uses feedback from the drive, so a reported motion or RPM problem can involve more than the sensor itself. A technician should inspect the sensor connection, associated wiring and the relevant mechanical assembly. A stalled drive or a binding door can prevent normal movement even when the sensing component is functional.
Record the diagnostic indication and photograph the installed assembly before ordering. Check the original part number against the equipment’s own replacement-parts drawing. Different commercial control generations and residential openers can use different sensor arrangements. The fact that a replacement has a similar connector or is advertised as a LiftMaster RPM sensor is not enough to identify the correct service item.
Specifications and Product Identification
| Specification | Details |
|---|---|
| Part number | K79-15016-1 |
| Component | RPM sensor assembly |
| Equipment category | Commercial door operators |
| Documented Logic 5 models | T, GT, APT, SD, GSD and GH in the referenced replacement-parts drawing |
| Additional documented example | Model T Logic 3 service manual |
| Selection requirement | Exact model, control generation and manufacturer service reference |
Before Ordering
- Record the full commercial operator model and control generation.
- Verify K79-15016-1 in the applicable replacement-parts diagram.
- Have wiring, connections and the mechanical drive checked against the reported fault.
- Identify any separate bracket or associated drive component required by the service procedure.
Package Contents and Separate Requirements
This listing identifies the RPM sensor assembly. A motor, logic board, drive shaft, limit assembly or complete electrical enclosure is not promised as included. Confirm the current kit contents against the repair instructions before ordering. Nearby items in an exploded view can be separate service parts, so do not assume the complete illustrated electrical assembly will arrive with the sensor.
Safety Warnings — Read Before Installation or Service
- WARNING: Commercial door equipment contains hazardous voltage and moving drive parts. Sensor replacement requires a trained door-systems technician.
- Disconnect and secure all applicable power sources before accessing the electrical enclosure or drive assembly.
- Do not bypass feedback, limits or protection devices to force an operator to run after a fault. Correct the underlying problem.
- Restore guards and verify the prescribed travel, reversal and monitored-safety responses before returning the door to normal use.
Related Products and Important Differences
- 041C4398A residential RPM sensor assembly — a different-part comparison for customers servicing a residential opener; not a substitute for K79-15016-1.
- CPS-U monitored commercial photo eyes — a separate protection component for approved operators and environments; it does not perform RPM feedback.
Frequently Asked Questions
Is this the same as residential part 041C4398A?
No interchangeable fit is established. The residential RPM assembly has a different part reference and must be selected from its own opener documentation.
Does an RPM error always mean this sensor failed?
No. Wiring, connections and the mechanical drive also require diagnosis. The sensor should be replaced only when the repair assessment supports it.
Will it fit every Logic 5 operator?
Use the exact parts diagram. The referenced drawing covers T, GT, APT, SD, GSD and GH assemblies; a family name alone is not a universal fit guarantee.
Will replacing it reset door travel limits automatically?
Do not assume so. Follow the model-specific service and testing procedure, including any required setup after the repair.
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.
Details
Need Help With Compatibility?
Not sure if this is the correct part for your garage door, operator, gate system, or application? Contact Us before ordering — we’re happy to help.
Garage-DoorParts.com carries a large selection of residential and commercial parts, and many components can look similar while having important differences in dimensions, model numbers, voltage, mounting, or compatibility.
For the best assistance, please provide as much information as possible, including the manufacturer, model number, part number, door or operator type, dimensions, and clear photos of the existing part or equipment.
Our goal is to help you identify the correct product before you order and reduce the possibility of ordering an incompatible part.
Contact Us with your product questions and compatibility information, and we’ll do our best to point you in the right direction.
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