{"product_id":"oem-goodman-150f-primary-high-limit-switch-for-ams81405dnba-20162903","title":"OEM Goodman 150F Primary High-Limit Switch for AMS81405DNBA — 20162903","description":"\u003ch2\u003eGoodman 20162903 Primary High-Limit Switch (150°F)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eGoodman 20162903\u003c\/strong\u003e is a genuine OEM primary high-limit switch with a \u003cstrong\u003e150°F trip point\u003c\/strong\u003e, built for the \u003cstrong\u003eAMS81405DNBA\u003c\/strong\u003e gas furnace and compatible Goodman \u0026amp; Amana models. Mounted on the heat-exchanger partition, this control senses supply-air temperature and opens the burner\/gas-valve circuit if the furnace overheats — typically caused by a dirty filter, blocked ductwork, or a failed blower. It is the furnace's front-line overheat protection and resets automatically once temperatures return to a safe range.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip temperature:\u003c\/strong\u003e 150°F (opens on rise)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Primary high-limit, auto-reset snap-disc\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContacts:\u003c\/strong\u003e Normally closed (SPST)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Heat-exchanger \/ vestibule panel, OEM bracket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman\/Amana AMS81405DNBA and related gas furnaces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe OEM 20162903 is factory-matched to the 150°F set point and the exact insertion depth of the heat exchanger. Generic snap discs with the wrong trip temperature or probe length can allow the furnace to run too hot or trip prematurely, causing short-cycling and reduced heat-exchanger life. Genuine OEM ensures correct calibration and fit.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Kill power, disconnect the two spade terminals, remove the mounting screws, and install the replacement in the same orientation. No calibration required. If the limit keeps tripping, check airflow (filter, blower, ducts) before condemning the switch.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057139270003,"sku":"GOODMAN-20162903","price":8.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-150f-primary-high-limit-switch-for-ams81405dnba-20162903","provider":"National HVAC Parts","version":"1.0","type":"link"}