{"product_id":"oem-goodman-150-f-primary-high-limit-switch-for-ams81405dnaa-b1370198","title":"OEM Goodman 150°F Primary High-Limit Switch for AMS81405DNAA — B1370198","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370198 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM high-limit safety control engineered for the \u003cstrong\u003eAMS81405DNAA\u003c\/strong\u003e gas furnace and compatible Goodman\/Amana models. Positioned on the heat exchanger bulkhead, the primary limit is the furnace's main line of defense against overheating, shutting off the burners if supply air temperature climbs too high.\u003c\/p\u003e\u003cp\u003eWith a \u003cstrong\u003e150°F\u003c\/strong\u003e trip point, this switch protects the heat exchanger from thermal stress and cracking caused by insufficient airflow — the most common cause being a clogged air filter or a weak blower. A failed primary limit is a frequent reason for no-heat and lockout complaints.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Temperature:\u003c\/strong\u003e 150°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Primary high-limit switch (heat exchanger)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e B1370198\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset:\u003c\/strong\u003e Automatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Goodman\/Amana AMS81405DNAA and related furnaces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM Goodman\u003c\/strong\u003e primary limit matches the precise trip temperature and mounting bracket your furnace requires. Because this switch guards the heat exchanger, a mis-spec'd generic can allow dangerous overheating or cause frustrating nuisance trips. OEM is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy to Moderate (2\/5)\u003c\/strong\u003e — Requires removing the burner-compartment or bracket access panel. Disconnect power first, transfer the wiring, and mount the new switch. If trips continue, replace the air filter and verify blower operation.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057725292915,"sku":"GOODMAN-7247","price":29.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-150-f-primary-high-limit-switch-for-ams81405dnaa-b1370198","provider":"National HVAC Parts","version":"1.0","type":"link"}