{"product_id":"oem-lennox-limit-switch-23g38","title":"OEM Lennox Limit Switch — 23G38","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e23G38\u003c\/strong\u003e limit switch is a critical safety control that monitors temperature inside the furnace heat exchanger and plenum. When the temperature climbs beyond a safe threshold — typically from restricted airflow — the switch opens and shuts off the burners to prevent overheating, protecting the heat exchanger and your home.\u003c\/p\u003e\u003cp\u003eA failed limit switch produces telltale symptoms: the furnace short-cycles (burners light then quickly shut off), the blower runs continuously, or you get no heat at all as the switch trips prematurely on a dirty filter, blocked ducts, or a failing blower. A switch that has burned open or drifted out of calibration will lock the furnace out even when temperatures are normal.\u003c\/p\u003e\u003cp\u003eUsing the OEM \u003cstrong\u003e23G38\u003c\/strong\u003e is essential because it is calibrated to the exact trip and reset temperatures Lennox engineered for your furnace model. A generic switch with the wrong temperature rating can either nuisance-trip or, worse, fail to open when it should — defeating the safety function. The factory-correct part restores reliable, code-compliant overheat protection.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081112371571,"sku":"LNX-23G38","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-23G38.jpg?v=1783762484","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-23g38","provider":"National HVAC Parts","version":"1.0","type":"link"}