{"product_id":"oem-lennox-limit-switch-39l08","title":"OEM Lennox Limit Switch — 39L08","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e39L08\u003c\/strong\u003e limit switch is a temperature-sensing safety control mounted in your Lennox furnace that monitors heat-exchanger and plenum temperatures. If the furnace overheats — typically from restricted airflow — the switch opens the circuit to shut down the burners and protect the equipment from damage and fire risk.\u003c\/p\u003e\u003cp\u003eA failing or nuisance-tripping limit switch commonly causes the furnace to short-cycle, shut off before reaching the set temperature, run the blower continuously, or lock out with no heat. A switch stuck open leaves you with no heat, while one stuck closed defeats a critical safety function.\u003c\/p\u003e\u003cp\u003eUsing the OEM Lennox \u003cstrong\u003e39L08\u003c\/strong\u003e is essential for safety-rated components: it's calibrated to the exact open and close temperatures your furnace requires. An incorrect aftermarket switch can trip early, fail to trip when needed, or fit improperly. This factory-direct replacement restores proper overheat protection and reliable operation to your Lennox system.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081107226995,"sku":"LNX-39L08","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-39L08.jpg?v=1783762547","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-39l08","provider":"National HVAC Parts","version":"1.0","type":"link"}