{"product_id":"oem-goodman-amana-primary-limit-switch-150-f-for-ams81405dnbc-20162903","title":"OEM Goodman Amana Primary Limit Switch 150°F for AMS81405DNBC — 20162903","description":"\u003ch2\u003eGoodman 20162903 Primary Limit Switch (150°F)\u003c\/h2\u003e\u003cp\u003eThe 20162903 is a genuine OEM primary high-limit switch for \u003cstrong\u003eGoodman and Amana AMS81405DNBC\u003c\/strong\u003e gas furnaces. Mounted on the heat exchanger partition, this auto-reset control opens at approximately \u003cstrong\u003e150°F\u003c\/strong\u003e to protect the furnace from overheating due to restricted airflow, a dirty filter, or a failed blower. It closes automatically once temperatures return to a safe range, preventing heat-exchanger damage and cracking.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Number: 20162903\u003c\/li\u003e\n\u003cli\u003eType: Primary high-limit switch\u003c\/li\u003e\n\u003cli\u003eTrip Temperature: 150°F (open-on-rise)\u003c\/li\u003e\n\u003cli\u003eReset: Automatic\u003c\/li\u003e\n\u003cli\u003eCompatibility: Goodman \u0026amp; Amana AMS81405DNBC and related furnace platforms\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe OEM 20162903 is factory-calibrated to the correct 150°F set point with the proper mounting flange and insertion depth. Generic switches with the wrong temperature rating cause short-cycling on limit or fail to protect the heat exchanger. For accurate over-temp protection, choose OEM.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Held by two screws with two wire terminals. If the limit trips repeatedly, address airflow (filter, blower, ducting) rather than replacing the switch alone. Disconnect power before servicing.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057728405875,"sku":"GOODMAN-7269","price":19.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-amana-primary-limit-switch-150-f-for-ams81405dnbc-20162903","provider":"National HVAC Parts","version":"1.0","type":"link"}