{"product_id":"oem-lennox-limit-control-primary-s-10-75m31","title":"OEM Lennox Limit Control Primary (S-10) — 75M31","description":"\u003cp\u003eThe \u003cstrong\u003eLennox 75M3101\u003c\/strong\u003e Primary Limit Control (S-10) is a critical OEM safety component that monitors the furnace heat exchanger temperature and shuts down the burner if unsafe heat levels are detected, protecting your Lennox system from overheating damage. A failing primary limit control can cause symptoms such as the furnace shutting off mid-cycle, inconsistent heating, or continuous fan operation without warm air delivery. As a genuine Lennox OEM part, the 75M31 provides an exact replacement fit and long-lasting reliability for compatible models.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081056239987,"sku":"LNX-75M31","price":19.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-control-primary-s-10-75m31","provider":"National HVAC Parts","version":"1.0","type":"link"}