{"product_id":"oem-goodman-200-f-primary-limit-switch-for-ams80905cna-b1370189","title":"OEM Goodman 200°F Primary Limit Switch for AMS80905CNA — B1370189","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB1370189\u003c\/strong\u003e is a genuine OEM \u003cstrong\u003e200°F\u003c\/strong\u003e primary limit switch for the Goodman\/Amana \u003cstrong\u003eAMS80905CNA\u003c\/strong\u003e gas furnace. Positioned over the heat exchanger, the primary high-limit is the furnace's main overheat guard: if supply-air temperature rises above the set point, it opens and de-energizes the gas valve while keeping the blower running to purge heat. A failed limit switch causes no-heat, short-cycling, or repeated lockouts.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Primary high-limit switch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip temperature:\u003c\/strong\u003e 200°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM part number:\u003c\/strong\u003e B1370189\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits model:\u003c\/strong\u003e AMS80905CNA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Primary overheat protection over heat exchanger\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset:\u003c\/strong\u003e Automatic (snap-disc)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe primary limit's set point and mounting depth are matched to the AMS80905CNA heat exchanger. The OEM B1370189 opens at 200°F exactly as certified. A generic snap-disc with the wrong temperature or probe length can nuisance-trip or allow unsafe operation. For the furnace's main safety limit, OEM is the recommended choice.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Easy\u003c\/h3\u003e\u003cp\u003eRated \u003cstrong\u003eEasy\u003c\/strong\u003e. Turn off power and gas, note the spade wire positions, remove the two mounting screws, and fit the replacement in the same opening so the sensing element sits in the correct air path. Restore power and verify a full heat cycle without a limit trip. If the old switch tripped, check for airflow restrictions or blower issues first.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057708548467,"sku":"GOODMAN-7099","price":18.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-200-f-primary-limit-switch-for-ams80905cna-b1370189","provider":"National HVAC Parts","version":"1.0","type":"link"}