{"product_id":"oem-lennox-limit-switch-56w24","title":"OEM Lennox Limit Switch — 56W24","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e56W24\u003c\/strong\u003e limit switch is a thermal safety device that protects your Lennox furnace from overheating. It senses the air temperature around the heat exchanger and cuts power to the gas burners the moment temperatures exceed the safe threshold, guarding against heat-exchanger damage caused by poor airflow or blower problems. The \u003cstrong\u003e56W24\u003c\/strong\u003e comes calibrated to the exact trip point Lennox engineered for your unit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the \u003cstrong\u003e56W24\u003c\/strong\u003e fails, you'll often notice the furnace short cycling — starting and stopping in quick succession — or repeated high-limit lockouts that leave you without heat. A stuck-closed switch may allow overheating, while a switch that trips too early causes frustrating intermittent shutdowns during normal operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Limit switches are safety components, and their trip temperature must match your furnace precisely. Aftermarket substitutes with the wrong rating can compromise protection or trigger false faults. Installing the factory-specified \u003cstrong\u003e56W24\u003c\/strong\u003e ensures the correct temperature calibration, terminal layout, and mounting for dependable, code-compliant Lennox furnace operation.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081102246259,"sku":"LNX-56W24","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-56W24.jpg?v=1783762578","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-56w24","provider":"National HVAC Parts","version":"1.0","type":"link"}