{"product_id":"oem-lennox-limit-switch-50f48","title":"OEM Lennox Limit Switch — 50F48","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e50F48\u003c\/strong\u003e limit switch is a temperature-sensing safety control that monitors heat inside your Lennox furnace. It signals the blower to run and, most importantly, shuts off the burners if the plenum temperature climbs too high, protecting the heat exchanger and surrounding components from dangerous overheating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing \u003cstrong\u003e50F48\u003c\/strong\u003e can cause the furnace to short-cycle, shut down mid-cycle on a limit trip, or fail to fire at all. Nuisance lockouts, a switch that stays open after cooling, or repeated overheating faults are typical signs the limit switch has drifted out of spec or failed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Limit switches are rated to open and close at precise temperature thresholds specific to your furnace model. An improperly rated aftermarket switch may trip too early, too late, or not at all — defeating a critical safety function. The OEM \u003cstrong\u003e50F48\u003c\/strong\u003e delivers the exact temperature calibration and mounting your Lennox equipment was engineered to use, ensuring safe, reliable operation.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081104015731,"sku":"LNX-50F48","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-50F48.jpg?v=1783762567","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-50f48","provider":"National HVAC Parts","version":"1.0","type":"link"}