{"product_id":"oem-goodman-primary-limit-switch-150f-for-ams80903bxa-furnace-b1370198","title":"OEM Goodman Primary Limit Switch 150F for AMS80903BXA Furnace — B1370198","description":"\u003ch2\u003eGoodman B1370198 Primary Limit Switch (150F)\u003c\/h2\u003e\u003cp\u003eThe Goodman \u003cstrong\u003eB1370198\u003c\/strong\u003e is a genuine OEM 150°F primary (high) limit switch built for the \u003cstrong\u003eAMS80903BXA\u003c\/strong\u003e gas furnace and matching Goodman and Amana 80% AFUE units. Mounted on the heat exchanger or blower deck, this normally-closed control opens the burner circuit when supply-air temperature exceeds the safe threshold — a common cause being restricted airflow from a dirty filter or blocked ducts — preventing heat exchanger damage and overheating.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTrip point: 150°F (open on temperature rise)\u003c\/li\u003e\n\u003cli\u003eType: Primary high-limit, normally closed, auto-reset\u003c\/li\u003e\n\u003cli\u003eFunction: Shuts off gas valve\/burners on overtemp\u003c\/li\u003e\n\u003cli\u003eDirect fit for AMS80903BXA and related Goodman\/Amana furnaces\u003c\/li\u003e\n\u003cli\u003eOEM part number: B1370198\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe genuine OEM B1370198 carries the factory-set 150°F calibration and exact mounting footprint. Generic substitutes often have different trip temperatures or bracket dimensions, which can cause short cycling on limit or fail to protect the heat exchanger. Choose OEM for this primary safety device.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5)\u003c\/strong\u003e — Remove two mounting screws, transfer the wires, and reinstall. Disconnect power first. If the limit keeps tripping, verify airflow before replacing.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057705173363,"sku":"GOODMAN-7051","price":12.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-primary-limit-switch-150f-for-ams80903bxa-furnace-b1370198","provider":"National HVAC Parts","version":"1.0","type":"link"}