{"product_id":"oem-goodman-170-f-primary-limit-switch-for-amh80904bnab-b1370188","title":"OEM Goodman 170°F Primary Limit Switch for AMH80904BNAB — B1370188","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370188 Primary Limit Switch\u003c\/strong\u003e is the genuine OEM high-limit control for the \u003cstrong\u003eAMH80904BNAB\u003c\/strong\u003e gas furnace and matching Goodman\/Amana 80% AFUE models. Installed on the heat exchanger bulkhead, it is the furnace's primary overheat safeguard — sensing supply-air temperature and shutting off the gas valve if the plenum exceeds its safe operating range, most often due to a dirty filter, blocked ducting, or blower failure.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip temperature:\u003c\/strong\u003e 170°F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset type:\u003c\/strong\u003e Automatic reset\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Primary high-temperature limit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e B1370188\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e AMH80904BNAB and related Goodman\/Amana furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman (Daikin family)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003egenuine OEM B1370188\u003c\/strong\u003e delivers the precise 170°F calibration and mounting footprint your furnace requires. Because the primary limit is the main line of defense against a cracked heat exchanger and overheating, we do not recommend generic switches with looser tolerances — a mismatched trip point can cause short-cycling or, worse, fail to protect the unit.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5).\u003c\/strong\u003e Turn off power, disconnect the two terminals, remove the mounting screws, and set the new limit flush against the heat exchanger. About 10–15 minutes. Resolve any airflow restriction before returning the furnace to service.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057632297331,"sku":"GOODMAN-5787","price":23.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-170-f-primary-limit-switch-for-amh80904bnab-b1370188","provider":"National HVAC Parts","version":"1.0","type":"link"}