{"product_id":"oem-lennox-limit-switch-10m64","title":"OEM Lennox Limit Switch — 10M64","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e10M64\u003c\/strong\u003e high-limit switch is a critical safety control that monitors the temperature inside your furnace's heat-exchanger compartment. If airflow is restricted and temperatures climb beyond a safe threshold, the switch opens and shuts off the gas valve to prevent overheating, protecting the heat exchanger and your home.\u003c\/p\u003e\u003cp\u003eWhen this switch fails or trips repeatedly, you may notice the furnace short cycling, the burners igniting then quickly shutting off, no heat despite a call from the thermostat, or the blower running continuously. Dirty filters, blocked returns, or a failing blower motor often cause limit trips, but a switch that has drifted out of calibration or opened permanently must be replaced.\u003c\/p\u003e\u003cp\u003eChoosing the OEM Lennox \u003cstrong\u003e10M64\u003c\/strong\u003e ensures the exact temperature rating and trip point your furnace was engineered to use. A mismatched limit switch can allow dangerous overheating or cause nuisance shutdowns. The factory part restores proper safety operation, maintains warranty coverage, and keeps your Lennox furnace running reliably through the heating season.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081088450931,"sku":"LNX-10M64","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-10M64.jpg?v=1783762449","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-10m64","provider":"National HVAC Parts","version":"1.0","type":"link"}