{"product_id":"oem-goodman-150-f-primary-limit-switch-for-ams80903bna-b1370198","title":"OEM Goodman 150°F Primary Limit Switch for AMS80903BNA — B1370198","description":"\u003ch2\u003eGoodman B1370198 Primary High-Limit Switch (150°F)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eB1370198\u003c\/strong\u003e is the genuine OEM primary high-limit switch for the Goodman\/Amana \u003cstrong\u003eAMS80903BNA\u003c\/strong\u003e gas furnace and compatible 80% AFUE models. Installed on the heat-exchanger supply-air side, this is the main overheat safety control: it continuously monitors plenum temperature and de-energizes the gas valve if the furnace exceeds its safe operating limit, then automatically restores the circuit once the cabinet cools. It is the single most important temperature safety in the heating cycle.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTrip temperature: \u003cstrong\u003e150°F (open-on-rise)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReset type: Auto-reset (closes on cool-down)\u003c\/li\u003e\n\u003cli\u003eCircuit: Normally closed primary high limit\u003c\/li\u003e\n\u003cli\u003eMount: Supply-air \/ heat-exchanger deck\u003c\/li\u003e\n\u003cli\u003eFits: Goodman \u0026amp; Amana AMS80903BNA and compatible 80% furnaces\u003c\/li\u003e\n\u003cli\u003eBrand: Genuine Goodman OEM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eOur \u003cstrong\u003eOEM B1370198\u003c\/strong\u003e guarantees the exact 150°F set point and bracket dimensions this furnace was certified with. Because the primary limit is a life-safety device, we strongly discourage generic substitutes — a mismatched trip point can allow the heat exchanger to overheat or cause repeated nuisance shutdowns. OEM ensures listed, drop-in protection.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5).\u003c\/strong\u003e Shut off power, disconnect the spade terminals, remove the two mounting screws, and install the replacement in the same orientation. Roughly 10–15 minutes. If the old limit tripped, verify blower operation and airflow before restarting.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057704649075,"sku":"GOODMAN-7032","price":12.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-150-f-primary-limit-switch-for-ams80903bna-b1370198","provider":"National HVAC Parts","version":"1.0","type":"link"}