{"product_id":"oem-goodman-120-f-auxiliary-limit-switch-for-ams81155cnaa-b1370155","title":"OEM Goodman 120°F Auxiliary Limit Switch for AMS81155CNAA — B1370155","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370155 Auxiliary Limit Switch\u003c\/strong\u003e is a genuine OEM secondary high-limit control engineered for the \u003cstrong\u003eAMS81155CNAA\u003c\/strong\u003e furnace and compatible Goodman\/Amana models. Mounted near the blower housing, this 120°F auxiliary limit acts as a backup to the primary limit — if the blower fails or airflow is restricted and cabinet temperatures climb, it de-energizes the gas valve to prevent overheating. It is a required safety component, and a furnace with a failed auxiliary limit will short-cycle or refuse to fire.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip temperature:\u003c\/strong\u003e 120°F (auto-reset, open-on-rise)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Auxiliary \/ secondary high-limit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Backup overheat \/ airflow-loss protection\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 B1370155\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003egenuine Goodman OEM part\u003c\/strong\u003e is factory-calibrated to the 120°F trip point matched to this cabinet's airflow design. Generic replacements rarely match the exact mounting bracket or trip temperature, risking nuisance trips or inadequate protection. For a secondary safety control, OEM is the reliable choice.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (DIY-friendly).\u003c\/strong\u003e Disconnect power, unplug the two spade terminals, remove the mounting screws, and swap in the new switch. Estimated time: 10–15 minutes. Verify blower operation and clean airflow after replacement to avoid repeat trips.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057715495283,"sku":"GOODMAN-7181","price":11.96,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-120-f-auxiliary-limit-switch-for-ams81155cnaa-b1370155","provider":"National HVAC Parts","version":"1.0","type":"link"}