{"product_id":"oem-lennox-limit-switch-83l90","title":"OEM Lennox Limit Switch — 83L90","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e83L90\u003c\/strong\u003e limit switch is a critical safety control in your Lennox furnace. It continuously monitors the temperature inside the heat exchanger compartment and automatically shuts off the burners if the unit overheats, protecting your furnace and your home from potential heat damage. This switch is engineered to the exact temperature threshold and mounting specifications required by your Lennox equipment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the \u003cstrong\u003e83L90\u003c\/strong\u003e fails or trips inconsistently, you may notice short cycling, a furnace that runs the blower but produces no heat, frequent lockouts, or a system that shuts down shortly after ignition. A worn or out-of-calibration limit switch is a leading cause of intermittent no-heat calls.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox limit switches are calibrated to precise trip points that generic aftermarket parts rarely match. Installing an OEM \u003cstrong\u003e83L90\u003c\/strong\u003e ensures the correct temperature setpoint, reliable safety response, and proper fit in the factory bracket — preserving both performance and warranty compliance for your Lennox system.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081093792115,"sku":"LNX-83L90","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-83L90.jpg?v=1783762622","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-83l90","provider":"National HVAC Parts","version":"1.0","type":"link"}