LiftMaster 41A6790 Wire Harness Kit
The LiftMaster 41A6790 is a replacement wire harness kit for select LiftMaster screw drive garage door openers. It restores the factory-style internal wiring connection where the original harness is damaged, deteriorated, or missing.
This part is tied to screw drive opener construction. It should be verified against the opener model and service parts diagram before ordering, especially because chain drive, belt drive, and screw drive units can use different harness assemblies that are not interchangeable.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster / Chamberlain |
| Product Type | Wire Harness Kit |
| Part Number | 41A6790 / 041A6790 |
| Application | Internal wiring harness for screw drive opener service |
| Compatible Operator Type | Select LiftMaster screw drive garage door openers |
| Compatibility | Also known as 041A6790 |
| Voltage | Internal opener wiring; service with power disconnected |
| Notes | Model-specific; verify by opener manual or parts diagram |
Also Known As / Related Part Numbers
- 041A6790
- 41A6790
- Screw drive wire harness kit
Technician Note
This is a screw-drive-specific harness reference. If the opener is not a screw drive model, confirm the correct part number before ordering.
Before Ordering Checklist
- Confirm the opener is a LiftMaster screw drive model.
- Match the harness to the exact parts diagram.
- Compare original connector shape and wire routing.
- Inspect for worn insulation or heat damage near the harness.
- Do not substitute with a belt drive or chain drive harness.
Professional Advisory
If the original harness failed from burning, arcing, or repeated electrical problems, have the opener inspected by a qualified garage door technician before installing a replacement.
Product Questions
What opener type is the 41A6790 harness for?
The 41A6790 harness is for select LiftMaster screw drive garage door openers.
Is 41A6790 the same as 041A6790?
Yes. 041A6790 is the current formatted part number, and 41A6790 is the common short part number.
Can this harness be used on a belt drive opener?
No. This part should be used only when the screw drive opener parts diagram calls for it.
Why does the original harness need to be compared?
Connector style, wire length, and routing can vary by opener generation even when parts look similar online.
What else should be inspected when replacing a harness?
Check nearby terminals, the board area, wire insulation, and mounting points for damage that may have caused the harness failure.
