{"product_id":"oem-lennox-furnace-limit-switch-69w38","title":"OEM Lennox Furnace Limit Switch — 69W38","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e69W38\u003c\/strong\u003e limit switch is a temperature-activated safety control that protects your Lennox furnace's heat exchanger from overheating. It monitors the temperature of the supply air and de-energizes the burners or heating elements if the unit exceeds its safe operating range, serving as a critical last line of defense against thermal damage and unsafe conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A worn or failed \u003cstrong\u003e69W38\u003c\/strong\u003e typically results in short cycling, a furnace that won't ignite, a blower that never shuts off, or a high-limit fault code on the control board. Because the switch trips on temperature, a unit with restricted airflow or a failing switch will often lock out mid-cycle.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Each Lennox limit switch is set to a model-specific cut-out temperature. The OEM \u003cstrong\u003e69W38\u003c\/strong\u003e delivers the exact calibration, terminal layout, and mounting fit specified by the factory — eliminating the risk of nuisance trips or defeated overheat protection that comes with generic aftermarket switches.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081097724275,"sku":"LNX-69W38","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-69W38.jpg?v=1783761146","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-furnace-limit-switch-69w38","provider":"National HVAC Parts","version":"1.0","type":"link"}