{"product_id":"oem-lennox-limit-switch-83l86","title":"OEM Lennox Limit Switch — 83L86","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e83L86\u003c\/strong\u003e limit switch safeguards your Lennox furnace by monitoring heat exchanger temperature and interrupting the burner circuit whenever the unit runs too hot. This automatic response protects against overheating from clogged filters, closed vents, or a failing blower, keeping your heating system operating within safe limits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the \u003cstrong\u003e83L86\u003c\/strong\u003e degrades, you may experience short cycling, a furnace that blows cold air, no-heat conditions, or intermittent shutdowns that clear and return. A limit switch that trips prematurely is a frequent cause of unreliable winter heating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The \u003cstrong\u003e83L86\u003c\/strong\u003e is set to a specific opening temperature and built to fit the factory mounting location in your Lennox furnace. Genuine OEM replacement ensures the correct calibration and secure fit that generic parts can't reliably deliver, protecting both system performance and warranty coverage.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081093890419,"sku":"LNX-83L86","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-83L86.jpg?v=1783762619","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-83l86","provider":"National HVAC Parts","version":"1.0","type":"link"}