{"product_id":"oem-goodman-150-f-primary-limit-switch-for-ams81155cna-b1370198","title":"OEM Goodman 150°F Primary Limit Switch for AMS81155CNA — B1370198","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370198 Primary Limit Switch\u003c\/strong\u003e is the OEM high-limit safety control for the \u003cstrong\u003eAMS81155CNA\u003c\/strong\u003e gas furnace. Mounted on the heat-exchanger bulkhead, it monitors supply-air temperature and opens the burner circuit if the plenum reaches its \u003cstrong\u003e150°F\u003c\/strong\u003e trip point — protecting the heat exchanger from cracking due to restricted airflow, a dirty filter, or blower failure.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip Temperature:\u003c\/strong\u003e 150°F (primary \/ high-limit circuit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Normally-closed, automatic-reset thermal limit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e B1370198\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Goodman (fits Amana-branded units)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Fit:\u003c\/strong\u003e AMS81155CNA gas furnace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquipment Type:\u003c\/strong\u003e Furnace\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003egenuine Goodman B1370198\u003c\/strong\u003e ships with the correct bracket geometry and a factory-matched 150°F set point. Universal limits frequently require bending or shimming to seat correctly against the exchanger, and mismatched trip temperatures lead to repeated shutdowns. For reliable, code-compliant operation, choose the OEM switch.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Removes with one or two screws and slides onto its spade terminals. De-energize the furnace and confirm airflow problems are corrected first — a limit that keeps tripping is usually a symptom of a dirty filter or failing blower, not a bad switch.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eNote: This is a genuine OEM Goodman replacement part. National HVAC Parts is not affiliated with or endorsed by Goodman Manufacturing.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057714774387,"sku":"GOODMAN-7171","price":26.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-150-f-primary-limit-switch-for-ams81155cna-b1370198","provider":"National HVAC Parts","version":"1.0","type":"link"}