{"product_id":"liftmaster-q029","title":"LiftMaster Q029 \/ K23-50099 Gate Operator Limit Switch","description":"\u003cp\u003e\u003cstrong\u003eThe LiftMaster Q029 is an electrical limit switch identified by the supplier as manufacturer part K23-50099. It is used in documented gate-operator limit arrangements, including the CSW200U repair-parts listing. Choose it when the diagnosed repair calls for this exact switch, and verify the mounting and connection against the applicable manual. It is not the Q238 adjustment cam, a complete limit assembly or a universal switch for every LiftMaster operator. The full service reference is essential when matching older Elite-branded equipment.\u003c\/strong\u003e\u003c\/p\u003e\u003ch2\u003eCompatibility — Models, Versions and Exclusions\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel or selection point\u003c\/th\u003e\n\u003cth\u003eCompatibility requirement\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCSW200U\u003c\/td\u003e\n\u003ctd\u003eThe referenced manufacturer repair-parts drawing identifies K23-50099 as the limit switch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMiracle-One\u003c\/td\u003e\n\u003ctd\u003eThe manufacturer parts list identifies Q029; verify the actual limit arrangement and required quantity.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQ238 \/ K75-50339\u003c\/td\u003e\n\u003ctd\u003eA separate adjustment component, not this electrical switch.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComplete limit assemblies and APS encoders\u003c\/td\u003e\n\u003ctd\u003eDifferent service items; no interchangeability established by a shared travel-control purpose.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eConfirm Whether the Switch or Its Actuating Mechanism Has Failed\u003c\/h2\u003e\u003cp\u003eAn inconsistent stopping position can originate in the electrical switch, its wiring or the mechanism that actuates it. Have the technician inspect these together rather than replacing a switch based only on the symptom. A loose holder or damaged adjustment component can prevent a sound switch from being operated at the correct point.\u003c\/p\u003e\u003cp\u003eThe replacement must mount and connect as prescribed for the operator. Do not select a generic microswitch solely because it looks similar, and do not assume unverified contact ratings or terminal arrangements. Record the original part reference and take a clear photograph before disconnecting wiring. This helps distinguish a single-switch repair from a job requiring the complete limit assembly.\u003c\/p\u003e\u003ch2\u003eSpecifications and Product Identification\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupplier SKU\u003c\/td\u003e\n\u003ctd\u003eQ029\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer reference\u003c\/td\u003e\n\u003ctd\u003eK23-50099\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComponent\u003c\/td\u003e\n\u003ctd\u003eElectrical travel-limit switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDocumented example\u003c\/td\u003e\n\u003ctd\u003eCSW200U manufacturer repair-parts list\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdditional legacy reference\u003c\/td\u003e\n\u003ctd\u003eMiracle-One manual lists Q029 as one limit switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelection basis\u003c\/td\u003e\n\u003ctd\u003eExact operator diagram, mounting and electrical connections\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBefore Ordering\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eIdentify the full operator model and applicable service drawing.\u003c\/li\u003e\n\u003cli\u003eMatch Q029 \/ K23-50099 to the installed switch.\u003c\/li\u003e\n\u003cli\u003eInspect the holder, adjustment parts, actuating mechanism and wiring.\u003c\/li\u003e\n\u003cli\u003eConfirm the number of switches and any separate mounting components needed for the repair.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003ePackage Contents and Separate Requirements\u003c\/h2\u003e\u003cp\u003eThis listing identifies the individual limit switch. A complete holder, adjustment cam, wiring harness or multi-switch assembly is not promised as included. Confirm the current carton before ordering. In a parts diagram, a switch can appear inside a larger service kit, but that does not make the entire illustrated assembly part of an individual Q029 purchase.\u003c\/p\u003e\u003ch2 class=\"safety-warning\"\u003eSafety Warnings — Read Before Installation or Service\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eWARNING: A faulty or incorrectly installed limit switch can allow dangerous travel beyond the intended stopping point. Use a qualified gate-systems technician.\u003c\/li\u003e\n\u003cli\u003eIsolate all applicable power sources and secure the gate before touching the switch or wiring.\u003c\/li\u003e\n\u003cli\u003eNever bridge a limit switch to restore normal operation. Keep the gate out of service until unreliable stopping is corrected.\u003c\/li\u003e\n\u003cli\u003eAfter service, perform the prescribed limit setup and verify both endpoints, reversal and all required protection devices.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eRelated Products and Important Differences\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-lmrrul-monitored-retro-reflective-photo-eye\"\u003eLMRRUL monitored photo eye\u003c\/a\u003e — a separate safety accessory only where the installed control system approves it; not a replacement limit switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/garage-doorparts.com\/products\/liftmaster-lmwekitu-monitored-wireless-edge-kit-for-gate-operators\"\u003eLMWEKITU monitored wireless edge kit\u003c\/a\u003e — a separate protection-system component with its own compatibility requirements; it does not establish travel endpoints.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eIs Q029 sold as a complete limit system?\u003c\/h3\u003e\u003cp\u003eNo. The manufacturer identifies Q029 as an individual limit switch. Confirm any additional holder, cam or harness needed.\u003c\/p\u003e\u003ch3\u003eIs Q238 interchangeable with this switch?\u003c\/h3\u003e\u003cp\u003eNo. Q238 is the separate K75-50339 adjustment component. The two have different roles in the limit arrangement.\u003c\/p\u003e\u003ch3\u003eWill this fit every Elite gate operator?\u003c\/h3\u003e\u003cp\u003eNo blanket fit is established. Use the exact model and generation’s parts documentation.\u003c\/p\u003e\u003ch3\u003eCan a new switch fix loose limit hardware?\u003c\/h3\u003e\u003cp\u003eNot by itself. The technician must correct mounting or actuating faults and verify the complete limit system after repair.\u003c\/p\u003e\u003ch2\u003eNeed Help Confirming the Right Product?\u003c\/h2\u003e\u003cp\u003e\u003ca href=\"https:\/\/garage-doorparts.com\/pages\/contact\"\u003eContact Garage-DoorParts.com before ordering\u003c\/a\u003e. Send the full equipment model, readable part labels and photographs of the installed assembly. Include the dimensions, electrical configuration or accessory details relevant to your project so the listing can be checked against the actual installation.\u003c\/p\u003e","brand":"Controlled products","offers":[{"title":"Default Title","offer_id":60655770861854,"sku":"Q029","price":15.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/2781\/5710\/files\/q029.jpg?v=1793139887","url":"https:\/\/garage-doorparts.com\/products\/liftmaster-q029","provider":"garage-doorparts.com","version":"1.0","type":"link"}