{"product_id":"oem-lennox-limit-control-s21-78l67","title":"OEM Lennox Limit Control S21 — 78L67","description":"\u003cp\u003eThe \u003cstrong\u003eLennox 78L67\u003c\/strong\u003e Limit Control S21 is a genuine OEM high-limit safety device engineered to sense plenum or heat exchanger temperatures and cut power to the burner assembly when temperatures exceed safe operating thresholds, protecting your Lennox furnace from damage. A failing limit control may cause symptoms such as frequent short cycling, the blower running continuously without heat, or a complete furnace lockout. This OEM replacement part provides exact-fit compatibility and reliable performance for the Lennox systems it was designed to serve.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081052832115,"sku":"LNX-78L67","price":19.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-control-s21-78l67","provider":"National HVAC Parts","version":"1.0","type":"link"}