{"product_id":"oem-goodman-primary-limit-switch-200f-for-gmt045-3b-furnace-b1370189","title":"OEM Goodman Primary Limit Switch 200F for GMT045-3B Furnace — B1370189","description":"\u003ch2\u003eGoodman B1370189 Primary Limit Switch (200°F)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eB1370189\u003c\/strong\u003e is a genuine Goodman primary high-limit switch engineered as a direct replacement for \u003cstrong\u003eGMT045-3B\u003c\/strong\u003e gas furnaces and related Goodman\/Amana equipment. Mounted on the heat exchanger\/plenum, this normally-closed control opens at roughly 200°F to interrupt the burner circuit and stop combustion if supply-air temperature climbs too high — the furnace's primary overheat protection against restricted airflow or a failed blower.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFunction: Primary high-limit safety switch\u003c\/li\u003e\n\u003cli\u003eOpen temperature: 200°F (auto-reset)\u003c\/li\u003e\n\u003cli\u003eConfiguration: Normally closed (opens on over-temperature)\u003c\/li\u003e\n\u003cli\u003eFit: Direct OEM replacement for GMT045-3B\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman genuine OEM part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003egenuine Goodman OEM\u003c\/strong\u003e switch is factory-calibrated to the exact 200°F trip point matched to this furnace's cabinet and airflow design. Generic replacements with a different rating or bracket can cause premature cycling on limit or allow the exchanger to overheat. For a life-safety component, OEM is the right choice.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1 of 5).\u003c\/strong\u003e Remove two screws, transfer the spade terminals, and mount the new switch in the same orientation. Shut off power and gas first; when in doubt, hire a licensed technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058155929971,"sku":"GOODMAN-12281","price":9.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-primary-limit-switch-200f-for-gmt045-3b-furnace-b1370189","provider":"National HVAC Parts","version":"1.0","type":"link"}