Liftmaster K2A0878, HALL EFFECT BOARD
The LiftMaster K2A0878 is a hall effect replacement board used in select LiftMaster commercial slide gate operators. This board is part of the operator feedback system and helps the control system read drive motion and position-related information during gate travel.
A failed or damaged hall effect board can contribute to movement faults, inconsistent travel feedback, nuisance obstruction errors, or operator faults that appear after the motor starts. Because this board works with the main control system, harness, drive components, and operator generation, it should be ordered only after the original board number and parts diagram have been verified.
Compatible With
Common Compatible Models
- LiftMaster SL3000U commercial slide gate operators
- LiftMaster SL3000UL commercial slide gate operators
- LiftMaster SL3000ULE commercial slide gate operators
- LiftMaster SL585U heavy-duty slide gate operators
- LiftMaster SL585UL heavy-duty slide gate operators
Additional Model Families to Verify
- Select SL3000 series slide gate operators where K2A0878 is listed
- Select SL585 series slide gate operators where K2A0878 is listed
Important Compatibility Notes
- Confirm the board number and harness style before ordering.
- Do not confuse this hall effect board with the main control board, power board, limit board, or receiver board.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Hall effect replacement board |
| Part Number | K2A0878 |
| Application | Motion/position feedback board for select commercial slide gate operators |
| Compatible Operator Type | Commercial slide gate operator |
| Common Model Families | SL3000U, SL3000UL, SL3000ULE, SL585U, SL585UL |
| Notes | Match by board number, harness, and operator parts diagram |
Also Known As / Related Part Numbers
- K2A0878
- 2A0878
- 2A878
- K2A878
- LiftMaster Hall Effect Board K2A0878
Technician Note
Hall effect faults can be caused by the board, harness, magnet/target arrangement, main control board, or drive-system movement. Diagnose the full circuit before replacing parts so the new board is not damaged by the same underlying issue.
Before Ordering Checklist
- Confirm the operator is SL3000U/UL/ULE or SL585U/UL style.
- Match the original board marking to K2A0878.
- Inspect the harness and plug connection for damage or corrosion.
- Check for mechanical binding or drive movement problems.
- Confirm monitored safety devices and operator setup are correct after service.
Professional Advisory
Circuit boards are sensitive to static, moisture, wiring faults, and incorrect connections. Replacement should be handled by a qualified gate technician when fault codes, motor wiring, or high-voltage compartments are involved.
Product Questions & Answers
Which operators commonly use K2A0878?
K2A0878 is commonly associated with LiftMaster SL3000U, SL3000UL, SL3000ULE, SL585U, and SL585UL commercial slide gate operators.
Is K2A0878 the main control board?
No. It is a hall effect board used for feedback. It is not the main control board, receiver board, or power board.
What symptoms can point to a hall effect board problem?
Possible symptoms include movement feedback errors, inconsistent travel readings, nuisance obstruction or motion faults, or faults that occur as the gate begins moving.
Should I replace the board before checking the harness?
No. A damaged harness, loose plug, corrosion, or drive-system issue can create similar symptoms, so those items should be inspected first.
Can this board be used on SL585 and SL3000 models interchangeably?
It may be used only on the SL585 and SL3000 generations that list K2A0878 in the parts diagram. Always verify the exact model and board number.
