Liftmaster K1D7078, EMI BOARD for HCT, HCTUL, IHSL24UL, INSL24UL
The LiftMaster K1D7078 is an EMI board service part for select LiftMaster commercial and industrial gate operator platforms. EMI stands for electromagnetic interference, and this board is used to help filter or control electrical noise that can affect sensitive control electronics. In high-duty gate environments, poor grounding, surge exposure, wiring problems, or motor noise can create intermittent issues that look like board failure.
This replacement board is most strongly associated with HCT and HCTUL specialty overhead operators, along with IHSL24UL and INSL24UL industrial slide gate operators. Some supplier references also associate it with HCTDCU, HDSL24UL, and HDSW24UL DC operator platforms. Because board generations and harness layouts can change, the old board number and the operator parts diagram should be checked before ordering.
Compatible With
- LiftMaster HCT specialty overhead operator references
- LiftMaster HCTUL specialty overhead operator references
- LiftMaster IHSL24UL industrial slide gate operators
- LiftMaster INSL24UL industrial slide gate operators
- Select LiftMaster HCTDCU DC overhead trolley references
- Select LiftMaster HDSL24UL heavy-duty slide gate references when shown by diagram
- Select LiftMaster HDSW24UL heavy-duty swing gate references when shown by diagram
- Commercial DC operator systems that specifically call for K1D7078
Compatibility note: Only use this board where K1D7078 is shown as the EMI board. Similar-looking control or filter boards may use different connectors and are not automatically interchangeable.
Features and Specifications
| Manufacturer | LiftMaster |
| Product Type | EMI replacement board |
| Part Number | K1D7078 |
| Application | Electrical noise filtering / EMI board service |
| Compatible Operator Type | Select commercial gate and specialty overhead operators |
| Common Models | HCT, HCTUL, IHSL24UL, INSL24UL |
| Notes | Verify connector layout and parts diagram |
Also Known As / Related Part Numbers
- K1D7078
- 1D7078
- LM-K1D7078
- LiftMaster EMI board K1D7078
- HCT EMI board
- INSL24UL EMI board
Technician Note
Before replacing an EMI board, inspect grounding, incoming power quality, surge protection, water intrusion, damaged harnesses, and loose terminal connections. A new board can fail again if the original electrical problem remains.
Before Ordering Checklist
- Match the original board number to K1D7078
- Confirm the operator model and generation
- Compare all harness plugs and terminal locations
- Inspect for surge damage, moisture, corrosion, or burned traces
- Have a qualified technician evaluate repeated electrical failures
Professional Advisory
This is an electrical control-system part. Do not work inside a powered operator cabinet. High-voltage diagnosis, grounding corrections, and board replacement should be handled by a qualified gate technician.
Product Questions and Answers
What does the K1D7078 EMI board do?
It helps manage electromagnetic interference and electrical noise in select LiftMaster commercial gate and overhead operator systems.
Which models are most commonly listed with K1D7078?
The strongest model references are HCT, HCTUL, IHSL24UL, and INSL24UL. Some service listings also reference HCTDCU, HDSL24UL, and HDSW24UL.
Can an EMI board cause intermittent operation?
Electrical noise, damaged EMI filtering, or related wiring issues can contribute to intermittent behavior, but the entire power and control circuit should be checked.
Is K1D7078 the main control board?
No. It is an EMI board, not the main logic/control board.
Should I replace this board after a surge?
Possibly, but surge damage can affect multiple boards and accessories. The system should be inspected before only replacing one board.
