{"product_id":"oem-lennox-rollout-limit-switch-87h64","title":"OEM Lennox Rollout Limit Switch — 87H64","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e87H64\u003c\/strong\u003e rollout limit switch (factory reference 20017401) is a critical safety control on your Lennox gas furnace. Mounted near the burner assembly, it monitors for flame rollout — a dangerous condition where flames escape the combustion chamber due to blockage or a venting problem. When it senses excessive heat, it opens the circuit and shuts down the burners to prevent damage and hazardous operation.\u003c\/p\u003e\u003cp\u003eA tripped or failed rollout switch typically results in a furnace that ignites briefly and then shuts off, no heat, or a lockout fault at the control board. Because this is a one-time manual-reset or thermally-responsive safety device, repeated tripping often points to an underlying issue such as a restricted heat exchanger, blocked flue, or dirty burners that should be diagnosed and corrected.\u003c\/p\u003e\u003cp\u003eUse only the OEM Lennox \u003cstrong\u003e87H64\u003c\/strong\u003e to ensure the correct trip temperature, reset behavior, and terminal configuration your furnace's safety circuit depends on. Substituting a switch with a different rating can allow unsafe operation or cause nuisance shutdowns. Installing the factory-specified part preserves the built-in safety margin and keeps your equipment warranty valid.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081142780275,"sku":"LNX-87H64","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-87H64.jpg?v=1783763398","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-rollout-limit-switch-87h64","provider":"National HVAC Parts","version":"1.0","type":"link"}