{"product_id":"oem-lennox-flame-rollout-switch-26h78","title":"OEM Lennox Flame Rollout Switch — 26H78","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e26H78\u003c\/strong\u003e flame rollout switch is a critical safety limit that protects your gas furnace from dangerous flame rollout — a condition where flames escape the burner box due to blocked venting, a cracked heat exchanger, or restricted combustion air. When it senses excessive heat outside the burner area, the \u003cstrong\u003e26H78\u003c\/strong\u003e instantly cuts power to the gas valve to prevent fire and equipment damage.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A tripped or failed rollout switch will typically shut the furnace down with no heat, often locking out the control board. You may notice the furnace igniting briefly then stopping, a switch that won't reset, soot around the burners, or a failure code on the control board. Because it is a one-shot manual-reset safety device, a nuisance-tripped or worn switch must be replaced, not bypassed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The \u003cstrong\u003e26H78\u003c\/strong\u003e is set to the precise trip temperature and physical dimensions Lennox specifies for your furnace model. A generic switch with the wrong temperature rating can fail to protect against a genuine hazard or nuisance-trip repeatedly. Installing the factory OEM switch preserves the safety certification and dependable operation Lennox engineered into your equipment. Never bypass this safety device.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081111322995,"sku":"LNX-26H78","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-limit-switch-rollout-LNX-26H78.jpg?v=1783760967","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-flame-rollout-switch-26h78","provider":"National HVAC Parts","version":"1.0","type":"link"}