LiftMaster K75-34709-1 Control Box with Hardware for RSL12V and RSW12V Operators
The K75-34709-1 is a replacement control box with hardware for supported LiftMaster RSL and RSW low-voltage gate operator platforms. The control box is the protective enclosure that keeps the electronic controls and wiring organized, mounted, and shielded from outdoor conditions. A cracked or damaged box can expose the board and harnesses to water, insects, debris, vibration, and accidental contact during service.
This assembly is most commonly used when the original box is damaged by weather, impact, age, missing screws, broken hinges or posts, or previous improper service. It is listed for RSL12V/RSL12VH slide operators and RSW12V/RSW12VH swing operators. Always verify the exact generation because similar-looking LiftMaster boxes can have different board mounts, knockouts, hinges, covers, and wiring provisions.
Compatible With
Supported listings identify this control box with hardware for the following LiftMaster low-voltage operator models.
- LiftMaster RSL12V slide gate operators
- LiftMaster RSL12VH slide gate operators
- LiftMaster RSW12V swing gate operators
- LiftMaster RSW12VH swing gate operators
- Various LiftMaster slide and swing gate operators only when the parts diagram lists K75-34709-1
Features and Specifications
| Manufacturer | LiftMaster |
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| Product Type | Control box with hardware |
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| Part Number | K75-34709-1 |
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| Application | Operator electronics enclosure replacement |
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| Compatible Operator Type | Low-voltage slide and swing gate operators |
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| Primary Models | RSL12V, RSL12VH, RSW12V, RSW12VH |
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| Included Components | Control box and mounting hardware as supplied by manufacturer |
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Also Known As / Related Part Numbers
- K75-34709-1
- 75-34709-1
- LM-K75-34709-1
- Control Box With Hardware
- Control Enclosure With Hardware
- RSL12V control box
- RSW12V control box
Technician Note
When replacing a control box, transfer wiring carefully and keep the same board orientation, strain relief, grounding, and cable routing. Label wires before removal if there is any doubt.
Before Ordering
- Confirm the operator is RSL12V, RSL12VH, RSW12V, or RSW12VH
- Compare the control box shape, hinge, mounting points, and board standoffs
- Inspect the control board and harnesses for water damage before reuse
- Verify that all enclosure hardware and gaskets are present after installation
- Do not substitute this for LA, CSW, CSL, SL, or commercial E-box assemblies
Professional Advisory
Control enclosure work can involve low-voltage and line-voltage wiring depending on the system. If wiring is damaged, burned, corroded, or undocumented, a qualified gate technician should perform the repair.
Important Ordering Warning
Similar LiftMaster control boxes are not always interchangeable. Board mounts, cover design, and wiring layout can differ by model and generation.
Product Questions and Answers
Which operators use K75-34709-1?
It is listed for LiftMaster RSL12V, RSL12VH, RSW12V, and RSW12VH gate operators.
Does this part include the control board?
No. It is a control box with hardware, not the electronic control board unless specifically stated by the supplier.
Can it replace an LA400 or LA500 control box?
No. Those operator families use different control enclosure designs.
Why would the control box need replacement?
Cracks, broken mounts, damaged cover hardware, water intrusion, impact damage, or missing hardware can require replacement.
Should wiring be labeled before replacing the box?
Yes. Labeling wiring and documenting board orientation helps prevent miswiring during transfer.
