{"product_id":"oem-goodman-150-f-primary-limit-switch-for-ams81155cnaa-b1370198","title":"OEM Goodman 150°F Primary Limit Switch for AMS81155CNAA — B1370198","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370198 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM high-limit safety control built for the \u003cstrong\u003eAMS81155CNAA\u003c\/strong\u003e gas furnace and compatible Goodman\/Amana models. Positioned over the heat exchanger, this 150°F primary limit continuously monitors supply-air temperature. If the furnace overheats — typically from a dirty filter, closed registers, or a failed blower — it opens the gas valve circuit to shut down combustion and protect the heat exchanger from cracking. It is the furnace's front-line overheat protection.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip temperature:\u003c\/strong\u003e 150°F (auto-reset, open-on-rise)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Primary high-limit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Heat-exchanger overheat cutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminals:\u003c\/strong\u003e 1\/4\" quick-connect spade\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e AMS81155CNAA and compatible Goodman \u0026amp; Amana furnaces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e B1370198\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis \u003cstrong\u003egenuine Goodman OEM limit\u003c\/strong\u003e is calibrated to the precise 150°F trip point the AMS81155CNAA was designed for, with the correct insertion depth and bracket. Generic universal limits force you to guess the trip temperature and often mount poorly, leading to nuisance lockouts or unsafe operation. Always use OEM for the primary limit.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy to Moderate.\u003c\/strong\u003e Shut off power and gas, remove the two mounting screws and spade terminals, and install the new limit in the same orientation. Estimated time: 15–20 minutes. Replace the air filter and confirm proper airflow to prevent repeat trips.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057715528051,"sku":"GOODMAN-7182","price":12.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-150-f-primary-limit-switch-for-ams81155cnaa-b1370198","provider":"National HVAC Parts","version":"1.0","type":"link"}