The LiftMaster K94-37449 is a factory-style reset button assembly supplied with an ID resistor for specific LiftMaster commercial gate operator control systems. On modern UL-compliant gate operators, the reset circuit is not just a simple push button; the control board may use an identification resistor or matching harness arrangement to recognize the correct reset input and maintain the proper fault-reset behavior.
This part is most commonly researched for CSW200 commercial swing gate operator service. It is used when the external or internal reset button becomes damaged, the button cap no longer actuates cleanly, the wiring has been compromised, or the operator will not clear a fault after proper troubleshooting. Correct fitment matters because other LiftMaster reset buttons may look similar but use different resistor values, connector layouts, harness lengths, or operator identification.
| Manufacturer | LiftMaster |
|---|---|
| Product Type | Reset button with ID resistor |
| Part Number | K94-37449 |
| Application | Manual reset / operator identification circuit service |
| Compatible Operator Type | Select commercial swing gate operators |
| Commonly Associated Models | CSW200, CSW200U, CSW200UL style references when confirmed by diagram |
| Notes | Match by part number, connector, resistor ID, and operator wiring diagram |
If the operator still shows a fault after the reset button is replaced, do not assume the switch was the only issue. Check the diagnostic display, entrapment inputs, stop circuit, and monitored safety devices before returning the gate to service.
Gate operator electrical service should be performed by a qualified technician. Disconnect power before accessing the control box and follow the LiftMaster wiring diagram for the installed operator.
The ID resistor helps the compatible LiftMaster control system recognize the correct reset circuit. It is one reason this part should be matched by part number and diagram instead of replaced with a generic button.
Yes, the strongest references tie K94-37449 to CSW200 commercial swing gate operator applications, including CSW200 style configurations when shown by the parts diagram.
No. Those are related reset switch part numbers for different operator families. They should not be treated as interchangeable unless LiftMaster documentation for the exact operator says so.
Common reasons include a damaged button, broken wiring, failed contact action, corrosion, or a reset circuit that no longer responds during normal fault-clearing procedures.
No. The reset and safety circuits should not be bypassed. A qualified gate technician should correct the fault and verify all required safety devices before the operator is returned to service.