{"product_id":"oem-lennox-limit-switch-71w44","title":"OEM Lennox Limit Switch — 71W44","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e71W44\u003c\/strong\u003e limit switch is a high-temperature safety control that monitors the heat exchanger and plenum temperature in your Lennox furnace. It signals the blower to run and, if the unit overheats due to restricted airflow or another fault, opens the circuit to shut down the burners and protect the equipment from damage.\u003c\/p\u003e\u003cp\u003eCommon symptoms of a failing limit switch include short-cycling on the heat call, the blower running continuously, no heat, or the furnace repeatedly locking out on a high-limit fault. A switch that trips too early points to airflow problems, while one that fails to open removes a critical layer of overheat protection.\u003c\/p\u003e\u003cp\u003eChoosing the OEM Lennox \u003cstrong\u003e71W44\u003c\/strong\u003e ensures the exact trip and reset temperatures, sensing length, and mounting configuration specified for your Lennox model. Aftermarket switches with different setpoints can cause nuisance shutdowns or leave the furnace unprotected. As a safety-critical part, it should always be replaced with the factory-matched component to restore correct, reliable operation.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081097003379,"sku":"LNX-71W44","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-71W44.jpg?v=1783762598","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-71w44","provider":"National HVAC Parts","version":"1.0","type":"link"}