{"product_id":"oem-lennox-limit-switch-y8852","title":"OEM Lennox Limit Switch — Y8852","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003eY8852\u003c\/strong\u003e limit switch is a temperature-activated safety control that protects your Lennox furnace from overheating. Mounted near the heat exchanger, it continuously monitors plenum temperature and opens the burner circuit if the furnace exceeds its safe operating range — preventing damage to the heat exchanger and reducing fire risk. It also helps sequence the blower during normal heating cycles.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e short cycling on high temperature, the furnace shutting down mid-cycle, burners that ignite but repeatedly cut out, or no heat because the limit has failed open. A limit switch that is stuck open, out of calibration, or fatigued from repeated overheating events will trip prematurely or fail to reset.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e the Lennox \u003cstrong\u003eY8852\u003c\/strong\u003e is built to the precise trip and reset temperatures your furnace was engineered around. Substitute switches with different setpoints can allow dangerous overheating or cause nuisance lockouts. Choosing the factory-specified part guarantees correct temperature response, proper fit, and full compatibility with your Lennox equipment.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081140388211,"sku":"LNX-Y8852","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-Y8852.jpg?v=1783762644","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-y8852","provider":"National HVAC Parts","version":"1.0","type":"link"}