{"product_id":"oem-lennox-limit-switch-83l83","title":"OEM Lennox Limit Switch — 83L83","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e83L83\u003c\/strong\u003e limit switch is a temperature-sensing safety control for your Lennox gas furnace. It watches the heat exchanger area and opens the burner circuit if temperatures climb beyond the safe threshold, preventing overheating damage and shutting the system down before a hazard develops.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A worn or failed \u003cstrong\u003e83L83\u003c\/strong\u003e commonly causes short cycling, furnace lockouts, blower operation without heat, or intermittent no-heat complaints. Over time the switch's trip point can drift, leading to nuisance shutdowns even when the furnace is otherwise healthy.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox calibrates the \u003cstrong\u003e83L83\u003c\/strong\u003e to an exact setpoint and terminal layout specific to your equipment. The genuine OEM part restores the correct safety response and provides a true drop-in fit — avoiding the calibration errors and fitment issues that plague universal aftermarket switches, and helping maintain your Lennox warranty.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081093923187,"sku":"LNX-83L83","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-83L83.jpg?v=1783762617","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-83l83","provider":"National HVAC Parts","version":"1.0","type":"link"}