{"product_id":"oem-lennox-flame-rollout-switch-71w49","title":"OEM Lennox Flame Rollout Switch — 71W49","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e71W49\u003c\/strong\u003e flame rollout switch is a manual-reset safety limit that guards against flames escaping the combustion chamber or burner box in your Lennox furnace. If temperatures near the burners exceed a safe threshold — a sign of flame rollout — the switch trips and cuts power to the gas valve, shutting the furnace down to prevent damage and hazard.\u003c\/p\u003e\u003cp\u003eWhen this switch trips or fails, the furnace will typically stop heating and lock out. Repeated tripping is usually a warning sign of an underlying problem such as a cracked heat exchanger, blocked flue, dirty burners, or a failing inducer, so the root cause should always be investigated rather than simply resetting or bypassing the switch.\u003c\/p\u003e\u003cp\u003eInstalling the OEM Lennox \u003cstrong\u003e71W49\u003c\/strong\u003e ensures the correct trip temperature, reset behavior, and mounting fit that Lennox engineered for this safety circuit. A generic switch with a different setpoint can either nuisance-trip or, worse, fail to protect against a genuine rollout condition. Never defeat this safety — replace with the factory-matched part and have the cause of any trip diagnosed by a professional.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081096970611,"sku":"LNX-71W49","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-71W49.jpg?v=1783760983","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-flame-rollout-switch-71w49","provider":"National HVAC Parts","version":"1.0","type":"link"}