LiftMaster Q400EHCT Omni Control Board for HCT Operators
The LiftMaster Q400EHCT is a specialized Omni control board configuration for HCT Series commercial overhead gate operators. The HCT operator family uses a different physical and mechanical platform than standard slide or swing gate operators, so the control board and reset arrangement need to match the exact HCT setup. Q400EHCT is commonly described as an Omni board with retrofit wall-mounted external reset button hardware, and some references list Q400DHCT as a related number. In the field, this part may be needed when an older HCT board has failed, when reset wiring has been updated, or when an Omni-style control repair is being performed. Because HCT operators can involve high loads, overhead gate movement, and multiple safety inputs, the board should be verified carefully before installation.
Compatible With
- LiftMaster HCT Series commercial overhead gate operators
- LiftMaster / Elite HCT operators that specifically call for Q400EHCT
- HCT Omni control board applications with retrofit wall-mounted external reset button
- Verify by HCT parts diagram and existing board number before ordering
Features and Specifications
| Manufacturer | LiftMaster |
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| Product Type | Control board |
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| Part Number | Q400EHCT |
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| Control Platform | Elite Omni / HCT configuration |
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| Application | Main control board for HCT operators |
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| Compatible Operator Type | HCT Series commercial overhead gate operators |
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| Related Number | Q400DHCT |
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| Notes | Not a universal Q400E-1 substitute |
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Also Known As / Related Part Numbers
- Q400EHCT
- Q400DHCT
- LiftMaster Q400EHCT
- HCT Omni control board
- Omni control board with external reset
- HCT retrofit reset board
- Elite HCT control board
Technician Note
HCT operator repairs should include a full check of the external reset circuit, entrapment protection, limit settings, and drive operation. A board failure can be caused by surge damage, shorted wiring, or accessory faults.
Before Ordering Checklist
- Confirm the operator is an HCT Series unit.
- Match the original board and reset-button configuration.
- Check whether Q400DHCT appears on the old documentation or board references.
- Inspect all safety, loop, receiver, and accessory wiring before power-up.
- Test reset operation and gate travel after installation.
Professional Advisory
Because this is a commercial overhead gate operator control board, replacement should be performed by a qualified gate technician. Do not bypass monitored safety inputs or reset circuits.
Important Ordering Warnings
- Do not use Q400EHCT as a general replacement for SL3000 or CSW200 boards.
- Do not energize the operator until wiring has been checked.
- Do not ignore surge or accessory wiring damage that may have caused the original board failure.
Product Questions and Answers
What is Q400EHCT used on?
Q400EHCT is an Omni control board with retrofit wall-mounted external reset button for LiftMaster HCT Series operators.
Is Q400EHCT the same as Q400E-1?
No. Q400EHCT is the HCT-specific version/application and should not be substituted for Q400E-1 without parts-diagram confirmation.
What related number is commonly listed?
Q400DHCT is commonly listed as an also-known-as or related number for Q400EHCT.
Can this board be used on SL3000 or CSW200?
Use Q400EHCT only where the HCT operator documentation calls for it. SL3000 and CSW200 Omni applications may use different board or kit references.
What should be checked after board replacement?
Limits, external reset wiring, safety devices, accessory inputs, and operator direction should be checked before returning the HCT operator to service.
