Liftmaster CB124, CONTROL BOARD, 24V
The LiftMaster CB124 is a 24V control board kit used on select LiftMaster residential swing gate systems. In a swing gate operator, the board coordinates gate movement, accessory commands, safety inputs, timing, and control-box logic. A failed board can cause the operator to stop responding, run inconsistently, or lose communication with accessories and safety equipment.
CB124 should be treated as a voltage- and generation-specific replacement. It is not the same as CB1-120, CB2-120, or the CB124EV EVO control platform. Some catalog references describe CB124 as a kit that may include a control board, control box, transformer, and installation hardware. Before ordering, verify what is included and compare the original operator manual or parts diagram so the replacement matches the actual gate system.
Common Replacement Reasons
- 24V swing gate operator does not respond to open/close commands.
- Accessory or safety inputs work intermittently after wiring is checked.
- Original board has corrosion, water damage, or visible electrical damage.
- Control box has been damaged and the board kit is called out by part number.
Compatible With
Common Compatible Applications
- Select LiftMaster residential swing gate operators using the CB124 24V control-board platform.
- 24V swing gate control boxes where the parts diagram lists CB124.
- Single- or residential gate control applications where the original board is marked CB124.
Additional Model Families to Verify
- LiftMaster 24V swing gate operator systems with external control boxes.
- Chamberlain/LiftMaster residential swing gate systems using 24V accessory and motor control.
- Older control-box assemblies where CB124 is listed as a replacement kit.
Important Compatibility Notes
Verify CB124 against the actual control box and operator generation. Do not substitute CB124EV or a 120V board unless the manufacturer parts diagram specifically confirms the change.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster / Chamberlain Group |
| Product Type | 24V control board kit |
| Part Number | CB124 |
| Voltage | 24V control platform; kit references may include 230V/60Hz transformer depending on package |
| Application | Residential swing gate operator control-board replacement |
| Compatible Operator Type | Select 24V LiftMaster residential swing gate operators |
| Included Components | Some references list control board, control box, transformer, and hardware; verify kit contents |
| Notes | Match original board and control box before ordering |
Also Known As / Related Part Numbers
- CB124
- LM-CB124
- LIF-CB124
- LiftMaster CB124
- Control Board 24V
Technician Note
If a CB124 board has failed, inspect the control box for water entry and check connected accessories before installing the new board. A shorted accessory wire can damage a replacement board quickly.
Before Ordering Checklist
- Confirm the original board is CB124.
- Verify the operator is a 24V swing gate system.
- Confirm kit contents before removing the old control box.
- Label accessory and safety-device wires before disconnecting.
- Do not bypass monitored safety devices during setup.
Professional Advisory
Use a qualified gate technician for control-board replacement if the system has uncertain wiring, damaged safety devices, or power problems. Gate movement and electrical diagnosis can be hazardous.
Product Questions & Answers
Is CB124 used for 120V operators?
No. CB124 is a 24V control-board platform and should not be substituted for CB1-120 or CB2-120 boards.
Is CB124 the same as CB124EV?
No. CB124EV is a newer EVO swing gate control board platform. Verify the exact part number and operator generation before ordering.
What may be included with CB124?
Some references list the board with a control box, transformer, and installation hardware, but kit contents should be confirmed for the specific listing.
What causes a 24V control board to fail?
Water intrusion, lightning or surge damage, accessory wiring shorts, incorrect voltage, and age are common causes.
Can the gate be run without safety devices after changing the board?
No. Required safety devices must remain installed, wired, and tested according to the operator instructions.
