{"product_id":"oem-lennox-high-limit-switch-26h65","title":"OEM Lennox High Limit Switch — 26H65","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e26H65\u003c\/strong\u003e high limit switch is a thermally activated safety control that protects your furnace from overheating. Positioned to sense heat exchanger and plenum temperature, it interrupts power to the gas valve whenever the furnace exceeds its safe operating range, safeguarding the heat exchanger, blower assembly, and surrounding components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A worn or tripped \u003cstrong\u003e26H65\u003c\/strong\u003e commonly causes no heat, frequent short-cycling, or the furnace shutting down shortly after ignition. Restricted airflow from a clogged filter, closed vents, or a weak blower motor can drive temperatures high enough to trip the limit repeatedly, and a switch that has failed open will keep the burners from firing until it is replaced.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The \u003cstrong\u003e26H65\u003c\/strong\u003e is set to the specific trip temperature and mounting dimensions Lennox specifies for your furnace model. A generic switch with an incorrect temperature rating can permit unsafe overheating or trigger repeated nuisance faults. Choosing the factory OEM switch ensures precise overheat protection, a proper fit, and the safe, dependable performance Lennox built into your equipment.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081111388531,"sku":"LNX-26H65","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-26H65.jpg?v=1783761963","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-high-limit-switch-26h65","provider":"National HVAC Parts","version":"1.0","type":"link"}