{"product_id":"oem-lennox-furnace-limit-switch-27h87","title":"OEM Lennox Furnace Limit Switch — 27H87","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e27H87\u003c\/strong\u003e limit switch serves as a temperature safety control, continuously monitoring the heat inside your furnace and cutting power to the burners whenever it detects unsafe overheating. Factory-calibrated to precise trip and reset temperatures, it guards against damage from blocked airflow, dirty filters, or blower malfunctions and helps keep your heating system operating within safe limits.\u003c\/p\u003e\u003cp\u003eWhen a limit switch begins to fail, you may experience short cycling with the furnace turning off before reaching temperature, a complete lack of heat, the blower running nonstop, or repeated lockout codes on the control board. A switch that opens too soon leaves you cold, while one that fails closed removes vital overheat protection.\u003c\/p\u003e\u003cp\u003eChoosing the OEM Lennox \u003cstrong\u003e27H87\u003c\/strong\u003e is important because its calibration, sensing element, and mounting are engineered specifically for your furnace. Substitute switches with the wrong trip range can cause false trips or allow unsafe temperatures to go unchecked. The genuine factory part restores accurate safety response and reliable, worry-free heating. In stock and ships same day when ordered before 3PM CST.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081110733171,"sku":"LNX-27H87","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-27H87.jpg?v=1783761136","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-furnace-limit-switch-27h87","provider":"National HVAC Parts","version":"1.0","type":"link"}