{"product_id":"oem-goodman-200-f-primary-limit-switch-for-gmnt090-5b-b1370189","title":"OEM Goodman 200°F Primary Limit Switch for GMNT090-5B — B1370189","description":"\u003ch2\u003eGoodman B1370189 Primary Limit Switch — 200°F\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB1370189\u003c\/strong\u003e is a genuine OEM primary high-limit switch rated to open at \u003cstrong\u003e200°F\u003c\/strong\u003e, built for the Goodman \u003cstrong\u003eGMNT090-5B\u003c\/strong\u003e gas furnace and compatible GMNT-series units. Mounted on the heat-exchanger bulkhead, the primary limit is the furnace's main overheat protector: if supply-air temperature exceeds the setpoint due to restricted airflow or blower failure, it opens the gas-valve circuit to prevent heat-exchanger damage.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: Primary high-limit switch\u003c\/li\u003e\n\u003cli\u003eOpen temperature: 200°F\u003c\/li\u003e\n\u003cli\u003eReset: Automatic (closes on cool-down)\u003c\/li\u003e\n\u003cli\u003eAction: Normally closed, opens on temperature rise\u003c\/li\u003e\n\u003cli\u003eMount: Heat-exchanger \/ plenum bracket\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMNT090-5B and compatible GMNT furnaces\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: B1370189\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe primary limit is a core safety device, so an exact 200°F setpoint and correct mounting depth are essential. This OEM switch matches Goodman's factory specification. Generic switches may vary in trip temperature or terminal orientation, which can cause short-cycling or missed protection. OEM is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy\u003c\/strong\u003e — Power off, disconnect the two leads, and secure the replacement in the original bracket. If the limit was tripping, correct any airflow restriction (filter, coil, ductwork, blower) before returning the unit to service. Professional diagnosis recommended for repeat trips.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058130600307,"sku":"GOODMAN-11709","price":16.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-200-f-primary-limit-switch-for-gmnt090-5b-b1370189","provider":"National HVAC Parts","version":"1.0","type":"link"}