{"product_id":"oem-lennox-limit-switch-10m76","title":"OEM Lennox Limit Switch — 10M76","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e10M76\u003c\/strong\u003e limit switch is a temperature-sensing safety control that protects your Lennox furnace from overheating. Mounted near the heat exchanger, it monitors plenum temperature and shuts off the burners if the furnace runs too hot — preventing heat exchanger damage, cracking, and unsafe operating conditions.\u003c\/p\u003e\u003cp\u003eA failing limit switch commonly causes short cycling, where the furnace fires and then shuts down before completing a heat call, or a blower that runs continuously. It can also lock out the furnace entirely, leaving you with no heat. Restricted airflow from a dirty filter or blocked ductwork frequently trips the limit, but an open or out-of-calibration switch itself must be replaced to restore safe, reliable heating.\u003c\/p\u003e\u003cp\u003eChoosing the OEM Lennox \u003cstrong\u003e10M76\u003c\/strong\u003e ensures the precise temperature setpoint and reset characteristics your furnace requires for both safety and proper operation. Generic limit switches with the wrong trip temperature can allow overheating or cause repeated nuisance shutdowns. Install a genuine factory limit switch to keep your Lennox furnace protected and running as designed.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081116336499,"sku":"LNX-10M76","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-10M76.jpg?v=1783762454","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-10m76","provider":"National HVAC Parts","version":"1.0","type":"link"}