{"product_id":"oem-goodman-170-f-primary-limit-switch-for-ams80704bxaa-b1370188","title":"OEM Goodman 170°F Primary Limit Switch for AMS80704BXAA — B1370188","description":"\u003ch2\u003eGenuine Goodman B1370188 Primary Limit Switch (170°F)\u003c\/h2\u003e\u003cp\u003eThe Goodman B1370188 is the OEM primary high-limit switch for \u003cstrong\u003eAMS80704BXAA\u003c\/strong\u003e gas furnaces and matching Amana 80% AFUE models. Mounted on the heat exchanger bulkhead, it continuously monitors supply-air temperature and opens the burner circuit at 170°F if the furnace overheats — typically from restricted airflow, a dirty filter, or a failing blower. It is the furnace's front-line overheat protection.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\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 point:\u003c\/strong\u003e 170°F (open on rise)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset:\u003c\/strong\u003e Automatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContacts:\u003c\/strong\u003e Normally closed (SPST)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount:\u003c\/strong\u003e Panel\/bulkhead mount, OEM bracket pattern\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e AMS80704BXAA and Goodman\/Amana 80% furnaces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003egenuine OEM Goodman\u003c\/strong\u003e B1370188 is factory-calibrated to 170°F with the correct disc diameter and insertion depth for your heat exchanger. Generic replacements frequently use a slightly different sensing-tube length, which changes the effective trip temperature and can trigger repeated safety lockouts. OEM eliminates that guesswork and keeps your warranty intact.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5).\u003c\/strong\u003e Roughly 15 minutes: cut power, pull the two spade connectors, remove the mounting screws, and install the replacement in the same orientation. No gas or refrigerant work involved. Before replacing, confirm airflow is unobstructed — a repeatedly tripping primary limit is usually a symptom of a clogged filter or weak blower, not a bad switch.\u003c\/p\u003e\u003cp\u003eGenuine Goodman reliability, ready to ship. Need help confirming fit? Email info@nationalhvacparts.com.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057691869555,"sku":"GOODMAN-6946","price":12.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-170-f-primary-limit-switch-for-ams80704bxaa-b1370188","provider":"National HVAC Parts","version":"1.0","type":"link"}