{"product_id":"oem-lennox-furnace-high-limit-switch-26h6501","title":"OEM Lennox Furnace High-Limit Switch — 26H6501","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e26H6501\u003c\/strong\u003e high-limit switch is a critical safety control mounted on the heat exchanger or blower housing of your Lennox furnace. It continuously senses plenum temperature and opens the burner circuit if the furnace overheats — typically from restricted airflow or a failed blower — protecting the heat exchanger and preventing dangerous conditions. It is calibrated to the precise trip and reset temperatures Lennox specifies for its furnace platforms.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A worn \u003cstrong\u003e26H6501\u003c\/strong\u003e can cause the furnace to short-cycle on heat, shut down mid-cycle, fail to fire at all, or trip repeatedly even with clean filters and good airflow. A switch stuck open produces no heat, while one that has drifted out of calibration may nuisance-trip or fail to protect against genuine overheating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e A limit switch is a safety device, and off-spec aftermarket units may trip at the wrong temperature or fail to open when they should. The factory-original \u003cstrong\u003e26H6501\u003c\/strong\u003e delivers the exact calibration, mounting fit, and terminal configuration your Lennox furnace requires — safeguarding the heat exchanger and keeping the system within its rated operating limits.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081144615283,"sku":"LNX-26H6501","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-26H6501.jpg?v=1783761123","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-furnace-high-limit-switch-26h6501","provider":"National HVAC Parts","version":"1.0","type":"link"}