Product Overview
The LiftMaster K23-11442 is a single-pole double-throw limit switch used on LiftMaster LGJ commercial door operators. In this type of operator, the limit switch interacts with the limit mechanism so the unit can stop at the correct open and close positions. A failed or damaged switch can create travel issues that may be mistaken for limit-nut, wiring, or control problems. This part is not a general-purpose replacement for every LiftMaster commercial door operator. It is specifically listed for LGJ applications where the parts breakdown calls for K23-11442 or 23-11442. Before ordering, compare the switch body, actuator, terminals, and mounting pattern with the original part. If the operator has wiring damage or high-voltage concerns, service should be completed by a qualified commercial door technician.
Compatible With
- LiftMaster LGJ commercial door operators that list K23-11442 in the parts diagram
- LiftMaster LGJ operator limit assemblies using SPDT switch reference 23-11442
- Commercial door operator service applications where the original switch number matches K23-11442
- Not confirmed for all LiftMaster commercial door operators outside the LGJ family
- Not interchangeable with different limit switch styles unless the manufacturer parts diagram confirms it
Features and Specifications
| Manufacturer | LiftMaster |
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| Product Type | SPDT limit switch |
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| Part Number | K23-11442 |
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| Related Numbers | 23-11442 |
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| Application | Commercial door operator travel limit control |
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| Compatible Operator Type | LiftMaster LGJ commercial door operators |
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| Switch Type | SPDT |
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| Notes | Compare actuator, terminals, and mounting before ordering |
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Also Known As / Related Part Numbers
- K23-11442
- 23-11442
- LM-K23-11442
- LiftMaster K2311442
- LiftMaster 2311442
Technician Note
This part should be matched by the operator model, original part number, and replacement parts diagram. Similar LiftMaster parts can look close but differ by switch rating, actuator style, chain length, bracket geometry, mounting pattern, or operator generation.
Before Ordering
- Confirm the manufacturer part number on the old part or parts diagram.
- Match the operator model and production series, not just the product family name.
- Compare physical mounting points, terminals, actuator style, chain length, or bracket layout where applicable.
- Check nearby worn parts that may have caused the original failure.
- For electrical switch replacement or unsafe gate movement, use a qualified gate or commercial door technician.
Professional Advisory
Gate and commercial door operators are heavy moving systems. Do not bypass monitored safety devices, limit controls, stop circuits, or required entrapment protection to keep an operator running. If the operator has high-voltage wiring issues, damaged controls, missing safety devices, or unpredictable movement, have the system inspected before returning it to service.
Product Questions and Answers
What operator does K23-11442 fit?
It is listed for LiftMaster LGJ commercial door operators that use this SPDT limit switch.
What does SPDT mean on this switch?
SPDT means single-pole double-throw, which describes the internal contact arrangement of the switch.
Is 23-11442 a related number?
Yes, 23-11442 is commonly listed as the related reference for K23-11442.
What problems can a bad LGJ limit switch cause?
It can cause incorrect stopping, limit adjustment trouble, intermittent travel response, or a switch that no longer actuates properly.
Can I replace it based only on appearance?
No. Similar switches can look close but differ by rating, actuator, terminal layout, and mounting pattern.
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