{"product_id":"oem-goodman-stack-overtemp-switch-for-gmnt120-5d-b1370254","title":"OEM Goodman Stack Overtemp Switch for GMNT120-5D — B1370254","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370254 Stack Overtemp Switch\u003c\/strong\u003e is a genuine OEM safety limit designed for the \u003cstrong\u003eGMNT120-5D\u003c\/strong\u003e gas furnace. This switch monitors the flue\/stack temperature and shuts down the furnace if combustion gases exceed a safe threshold — a condition that can result from a blocked flue, cracked heat exchanger, or over-firing. As a dedicated overtemp safety, it protects both the equipment and the home from unsafe venting conditions.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: B1370254\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman\u003c\/li\u003e\n\u003cli\u003eType: Stack \/ flue overtemperature limit switch\u003c\/li\u003e\n\u003cli\u003eFunction: High-temperature combustion cutoff\u003c\/li\u003e\n\u003cli\u003eEquipment Type: Gas Furnace\u003c\/li\u003e\n\u003cli\u003eCompatible Model: GMNT120-5D\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe OEM B1370254 is factory-calibrated to Goodman's specified trip temperature and terminal layout for the GMNT120-5D stack location. Generic overtemp switches risk incorrect setpoints that either nuisance-trip or fail to protect the furnace. For a combustion-safety component, OEM is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate — DIY with caution.\u003c\/strong\u003e Requires locating the switch on the flue\/stack, disconnecting terminals, and swapping in the replacement with power and gas off. Because it relates to flue temperature, any repeated tripping should prompt a professional inspection of the heat exchanger and venting before returning the unit to service.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058132271475,"sku":"GOODMAN-11774","price":13.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-stack-overtemp-switch-for-gmnt120-5d-b1370254","provider":"National HVAC Parts","version":"1.0","type":"link"}