Marantec 122943 Control Box for Synergy Solo 120791 Operators
The Marantec 122943 control box is the main control assembly used in the Synergy Solo operator platform. It provides the electronic control point for the motor, safety circuits, wall control, and supported accessories. If the control box is damaged, the opener may stop responding, behave intermittently, lose safety input communication, or fail during setup. This part is usually replaced only after power, transformer, wiring, wall control, and safety sensor issues have been checked.
The strongest compatibility reference for 122943 is Synergy Solo model 120791. It should not be interchanged with 116421 Synergy 200 Series or 116422 Synergy 300 Series control boxes. The Synergy Solo housing, connector layout, and transformer pairing differ from other Marantec opener families, so compare the original label, dimensions, and parts diagram before ordering. This part is a control box assembly, not the transformer box or lens.
Compatible With
- Marantec Synergy Solo garage door operators
- Marantec Synergy Solo 120791 operators where part number 122943 is listed
- Select Synergy Solo control box replacements with the same connector and housing layout
- Residential sectional-door opener applications using the matching Synergy Solo control box
- Not intended for Synergy 260, 270, 280, 360, 370, 380, M-Line, Q-Line, or EOS operators unless documentation confirms 122943
Features and Specifications
| Manufacturer | Marantec |
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| Product Type | Control box / logic control assembly |
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| Part Number | 122943 |
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| Application | Control electronics for Synergy Solo operators |
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| Compatible Operator Type | Residential Marantec garage door opener |
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| Common Model | Synergy Solo 120791 |
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| Approximate Dimensions | 4-1/16 in. L x 2-1/8 in. W x 7/8 in. D where listed by supplier |
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| Programming Notes | Opener setup, accessory programming, and safety checks may be required after installation |
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| Related Power Part | 122944 transformer box for Synergy Solo applications |
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Also Known As / Related Part Numbers
- 122943
- MAR-122943
- Marantec 122943
- 122943 control box
- Synergy Solo control box
- Synergy Solo 120791 control box
- Related but different: 122944 Synergy Solo transformer box, 122942 Synergy Solo lens, 116421 Synergy 200 control box, 116422 Synergy 300 control box
Technician Note
If a Synergy Solo opener is dead, do not assume the control box is the only failed part. Check the detachable cord, transformer box, safety wiring, and accessory wiring before installing a new control box.
Before Ordering Checklist
- Confirm the opener is Synergy Solo or Synergy Solo 120791
- Match the original control box label to 122943
- Compare connector locations and housing dimensions
- Inspect transformer output and low-voltage wiring before replacement
- Test photo eyes, wall control, remotes, travel, and force settings after installation
Professional Advisory
This part works with safety inputs and opener logic. Do not bypass photo eyes or other safety devices. If wiring is burned, wet, or shorted, have the opener inspected by a qualified garage door technician.
Important Ordering Warnings
- 122943 is not the same part as 122944. 122943 is the control box, while 122944 is the transformer box.
- Do not substitute Synergy 200 or Synergy 300 control boxes for the Synergy Solo control box.
Product Questions and Answers
What opener uses the Marantec 122943 control box?
The 122943 control box is commonly associated with the Marantec Synergy Solo, especially Synergy Solo model 120791.
Is 122943 a transformer?
No. 122943 is the control box. The related Synergy Solo transformer box is commonly listed as 122944.
Can this replace a Synergy 260, 270, or 280 control box?
No, not normally. Synergy 260, 270, and 280 operators are Synergy 200 Series models and commonly use the 116421 control box family.
What should be tested after installing this control box?
Test travel limits, force settings, photo eyes, wall control, remote operation, and normal open/close cycling.
Can a bad transformer make the control box look failed?
Yes. A failed transformer or power issue can cause no-response symptoms, so power should be checked before replacing the control box.
