{"product_id":"oem-lennox-limit-switch-30m07","title":"OEM Lennox Limit Switch — 30M07","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e30M07\u003c\/strong\u003e limit switch is a critical safety control that monitors the temperature in your furnace's heat exchanger area. It automatically shuts off the burners if the unit overheats, protecting the heat exchanger, wiring, and internal components from heat damage in compatible Lennox furnaces.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A faulty \u003cstrong\u003e30M07\u003c\/strong\u003e can cause the furnace to short cycle, shut down unexpectedly during a heating call, blow warm-then-cold air, or fail to fire the burners at all. A limit switch that trips repeatedly may also indicate restricted airflow, but a switch stuck open or with degraded contacts must be replaced to restore normal operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Limit switches are safety devices calibrated to a specific trip temperature. This authentic OEM \u003cstrong\u003e30M07\u003c\/strong\u003e is set to the exact Lennox factory temperature rating, ensuring your furnace shuts down at the correct threshold — no sooner, no later. Generic replacements with the wrong set point can allow dangerous overheating or cause nuisance trips. Install the genuine Lennox part for verified safety and reliable heating.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081109487987,"sku":"LNX-30M07","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-30M07.jpg?v=1783762508","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-30m07","provider":"National HVAC Parts","version":"1.0","type":"link"}