{"product_id":"oem-lennox-limit-switch-56w26","title":"OEM Lennox Limit Switch — 56W26","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e56W26\u003c\/strong\u003e limit switch is a critical safety control that monitors temperature inside the heat exchanger compartment of your Lennox furnace. If airflow is restricted or temperatures climb beyond the safe threshold, the \u003cstrong\u003e56W26\u003c\/strong\u003e opens the circuit and shuts down the burners to prevent damage to the heat exchanger and surrounding components. It is factory-calibrated to the exact trip point Lennox specifies for your model.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A worn or failed limit switch often causes the furnace to short cycle — igniting and then shutting off repeatedly — or to run the blower continuously without heat. In some cases a bad switch trips prematurely on normal operation, or fails to open and allows the unit to overheat. Nuisance lockouts and no-heat conditions are frequent signs the \u003cstrong\u003e56W26\u003c\/strong\u003e needs replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Because this is a safety device, correct calibration is essential. Universal or mismatched limit switches may trip at the wrong temperature, leaving your furnace unprotected or prone to false shutdowns. The OEM \u003cstrong\u003e56W26\u003c\/strong\u003e ensures the precise temperature rating, terminal configuration, and mounting your Lennox equipment requires for safe, reliable operation.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081102180723,"sku":"LNX-56W26","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-56W26.jpg?v=1783762581","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-limit-switch-56w26","provider":"National HVAC Parts","version":"1.0","type":"link"}