{"product_id":"oem-lennox-limit-switch-30m03","title":"OEM Lennox Limit Switch — 30M03","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e30M03\u003c\/strong\u003e limit switch is a temperature-sensing safety control that guards your furnace against overheating. Mounted near the heat exchanger, it opens the burner circuit when temperatures exceed the safe operating range, protecting your compatible Lennox furnace from heat-related damage and ensuring safe cycling.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the \u003cstrong\u003e30M03\u003c\/strong\u003e fails, you may experience the furnace short cycling, shutting off mid-cycle, delivering inconsistent heat, or not lighting the burners at all. A switch with worn contacts, a cracked bimetal disc, or an incorrect trip point will disrupt normal heating and should be replaced promptly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e This limit switch is calibrated to a precise Lennox factory trip temperature. The authentic OEM \u003cstrong\u003e30M03\u003c\/strong\u003e guarantees the correct set point, terminal configuration, and mounting fit for your unit. Aftermarket switches with mismatched ratings can permit unsafe overheating or cause frustrating nuisance shutdowns. For dependable safety and worry-free operation, choose the genuine Lennox component.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081109520755,"sku":"LNX-30M03","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-30M03.jpg?v=1783762506","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-30m03","provider":"National HVAC Parts","version":"1.0","type":"link"}