{"product_id":"oem-lennox-limit-switch-46k69","title":"OEM Lennox Limit Switch — 46K69","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e46K69\u003c\/strong\u003e limit switch is a critical safety control in your Lennox furnace. Mounted on the heat exchanger or blower housing, it monitors internal temperature and shuts off the burners if the unit overheats — protecting the heat exchanger, wiring, and your home from thermal damage. This factory-spec switch is calibrated to the exact trip and reset temperatures Lennox engineers designed for your system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Furnace short-cycling (heat turning on and off rapidly), the blower running continuously, no heat output, or the burners igniting then quickly shutting down. A limit switch that trips prematurely or fails open will lock out the furnace to keep it safe.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Aftermarket limit switches often have incorrect temperature calibration, which can either allow dangerous overheating or cause nuisance shutdowns. The OEM Lennox \u003cstrong\u003e46K69\u003c\/strong\u003e guarantees the precise set point, mounting fit, and terminal configuration your equipment requires for reliable, safe operation season after season.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081089433971,"sku":"LNX-46K69","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-limit-switch-snap-disc-LNX-46K69.jpg?v=1783762552","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-46k69","provider":"National HVAC Parts","version":"1.0","type":"link"}