LiftMaster K41-0256-000 Interlock Harness for IHSL24UL
The LiftMaster K41-0256-000 is the interlock harness service kit for the IHSL24UL industrial heavy-duty slide gate operator. This harness is used inside the operator to maintain the proper interlock wiring path between supported internal components. Harness condition matters because loose pins, damaged insulation, corrosion, crushed wire, or a previous improper repair can create intermittent faults that are difficult to trace. This is a model-specific internal wiring part, not a universal jumper or bypass harness. It should be selected when the installed IHSL24UL parts diagram or diagnosis points to the interlock harness. When replacing this harness, inspect the mating connectors, board terminals, enclosure moisture condition, and any area where wiring may have rubbed against moving parts or sharp metal edges. Safety interlock circuits should never be bypassed to make a gate run.
Compatible With
This part is commonly associated with the following LiftMaster operator models and service applications. Always verify the installed model number and parts diagram because similar industrial slide operators may use different motors, boards, reducers, or harnesses.
- LiftMaster IHSL24UL industrial heavy-duty slide gate operators
- LiftMaster IHSL24ULMC references when the diagram calls for this harness
- IHSL24UL internal interlock wiring applications
- Replacement use where the installed harness number or parts diagram matches K41-0256-000
Also Known As / Related Part Numbers
- K41-0256-000
- 41-0256-000
- LIF-K41-0256-000
- LiftMaster K41-0256-000
- IHSL24UL interlock harness
Features & Specifications
| Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Interlock Harness Service Kit |
| Part Number | K41-0256-000 |
| Application | Interlock harness replacement for IHSL24UL industrial slide gate operators |
| Compatible Operator Type | Industrial 24VDC slide gate operator |
| Compatible Models | IHSL24UL, IHSL24ULMC |
| Security / Safety Note | Keep all required monitored entrapment protection devices connected and working. |
| Notes | Verify the installed operator model, original part number, and current LiftMaster parts diagram before ordering. |
Technician Note
Do not substitute the INSL24UL interlock harness K41-0255-000 unless the installed operator diagram specifically allows it. If the original part failed after a surge, water intrusion, gate impact, or mechanical binding condition, correct that problem before installing the replacement part.
Before Ordering
- Confirm the LiftMaster operator model and any MC or package-code reference on the data label.
- Compare the installed part number and connector style against the current parts diagram.
- Inspect related drive, wiring, battery, control-board, and safety-device components before replacing parts.
- Do not use similar-looking INSL24UL and IHSL24UL parts interchangeably unless the parts diagram confirms it.
- Use a qualified gate technician for high-voltage, battery, motor, drive-board, or moving-gate service.
Professional Advisory
Industrial slide gate operators are powerful pieces of moving equipment. After any motor, board, limit, harness, alarm, or gear reducer repair, the gate must be tested through a complete open and close cycle with all required monitored safety devices connected and operating. Do not bypass photo eyes, safety edges, interlocks, alarms, or other entrapment protection devices to force the operator to run.
Important Ordering Warnings
- INSL24UL and IHSL24UL parts can look similar but may not interchange.
- Model suffixes, package codes, and parts-diagram revisions can affect the correct service part.
- Electrical faults, water damage, or gate binding can damage replacement parts if left unresolved.
- Compatibility is based on supported model families and should be verified against the installed operator.
Product Questions & Answers
What is the purpose of K41-0256-000?
K41-0256-000 restores the supported internal interlock wiring path for the listed LiftMaster industrial slide gate operator family.
Can this harness be used to bypass an interlock?
No. It is a replacement harness and should never be used to bypass a safety, interlock, or monitored protection circuit.
What problems can a damaged interlock harness cause?
A damaged harness may cause intermittent faults, non-response, unreliable interlock behavior, or error codes that appear to be board or accessory problems.
Should the connectors be inspected during replacement?
Yes. Check pin fit, corrosion, moisture staining, damaged insulation, routing clips, and any area where the harness may rub against metal or moving components.
Is the INSL24UL harness the same as the IHSL24UL harness?
No. The part number and operator family should match the parts diagram. Similar harness names do not guarantee interchangeability.
