{"product_id":"oem-goodman-200-f-primary-limit-switch-for-gmth090-5b-b1370189","title":"OEM Goodman 200°F Primary Limit Switch for GMTH090-5B — B1370189","description":"\u003ch2\u003eGoodman B1370189 Primary Limit Switch — 200°F\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB1370189 primary limit switch\u003c\/strong\u003e is a genuine OEM high-limit safety control rated at \u003cstrong\u003e200°F\u003c\/strong\u003e for the \u003cstrong\u003eGMTH090-5B\u003c\/strong\u003e gas furnace. As the main overheat protector, it monitors supply-air temperature at the heat exchanger and opens the burner circuit when the furnace exceeds its safe operating limit — guarding against restricted airflow, a failed blower, or an oversized temperature rise.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart number: B1370189 (OEM Goodman)\u003c\/li\u003e\n\u003cli\u003eType: Primary high limit switch\u003c\/li\u003e\n\u003cli\u003eTrip temperature: 200°F\u003c\/li\u003e\n\u003cli\u003eFunction: Normally closed, opens on overheat\u003c\/li\u003e\n\u003cli\u003eFits: Goodman GMTH090-5B gas furnace\u003c\/li\u003e\n\u003cli\u003eEquipment: Gas furnace\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM B1370189\u003c\/strong\u003e is calibrated to the precise 200°F setpoint Goodman engineered for this furnace's temperature rise. A generic limit with the wrong rating can short-cycle the burner or allow unsafe temperatures. Because this is the furnace's primary safety limit, we recommend the OEM part.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Easy\u003c\/h3\u003e\u003cp\u003eRated \u003cstrong\u003eEasy\u003c\/strong\u003e — two spade terminals and a bracket screw. Turn off power at the disconnect first. If the old limit was tripping, correct any airflow restriction (dirty filter, closed dampers, weak blower) before restarting the furnace.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057148739955,"sku":"GOODMAN-B1370189","price":9.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-200-f-primary-limit-switch-for-gmth090-5b-b1370189","provider":"National HVAC Parts","version":"1.0","type":"link"}