{"product_id":"oem-goodman-200-f-primary-limit-switch-for-amh80905cxaa-b1370189","title":"OEM Goodman 200°F Primary Limit Switch for AMH80905CXAA — B1370189","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB1370189 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM \u003cstrong\u003e200°F\u003c\/strong\u003e high-limit safety control for the \u003cstrong\u003eAMH80905CXAA\u003c\/strong\u003e 80% gas furnace and compatible Goodman\/Amana models. Mounted on the heat-exchanger\/burner bulkhead, the primary limit opens the control circuit and shuts down the burners if supply-air temperature climbs too high, guarding the heat exchanger against overheating from restricted airflow.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart type: Primary high-limit switch (auto reset)\u003c\/li\u003e\n\u003cli\u003eTrip temperature: 200°F\u003c\/li\u003e\n\u003cli\u003eOEM part number: B1370189\u003c\/li\u003e\n\u003cli\u003eCompatible model: AMH80905CXAA (80% gas furnace)\u003c\/li\u003e\n\u003cli\u003eBrand family: Goodman \/ Amana\u003c\/li\u003e\n\u003cli\u003eFunction: Heat-exchanger overheat protection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe primary limit is one of the furnace's core safeties, and its 200°F setpoint and bracket geometry are model-specific. The OEM B1370189 matches the factory calibration and mounting exactly. A generic limit at the wrong temperature can short-cycle the furnace or mask a genuine airflow problem.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy\u003c\/strong\u003e — remove two screws and two spade terminals, then transfer to the new switch. Always disconnect power and address any airflow restriction (filter, blower, ducting) before restarting.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057136943475,"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-amh80905cxaa-b1370189","provider":"National HVAC Parts","version":"1.0","type":"link"}