{"product_id":"oem-goodman-150-f-primary-limit-switch-ames920805cnaa-20162903","title":"OEM Goodman 150°F Primary Limit Switch AMES920805CNAA — 20162903","description":"\u003ch2\u003eGoodman 20162903 Primary Limit Switch (150°F)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003e20162903\u003c\/strong\u003e is a genuine OEM Goodman primary limit switch with a \u003cstrong\u003e150°F\u003c\/strong\u003e trip point, built for the \u003cstrong\u003eAMES920805CNAA\u003c\/strong\u003e gas furnace. Mounted on the heat exchanger or supply-air plenum, this snap-disc safety monitors supply-air temperature and de-energizes the gas valve if the furnace overheats — typically due to restricted airflow from a clogged filter or blocked ducting. It resets automatically once temperatures return to normal.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 20162903\u003c\/li\u003e\n\u003cli\u003ePart Type: Primary High-Limit Switch\u003c\/li\u003e\n\u003cli\u003eTrip Temperature: 150°F\u003c\/li\u003e\n\u003cli\u003eReset: Automatic (snap-disc)\u003c\/li\u003e\n\u003cli\u003eFunction: Overheat \/ airflow-failure safety cutoff\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman \/ Amana\u003c\/li\u003e\n\u003cli\u003eCompatible Model: AMES920805CNAA (gas furnace)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe 150°F calibration is matched to the AMES920805CNAA's airflow and heat-exchanger design. Genuine OEM 20162903 switches trip at the exact factory temperature, preventing nuisance lockouts while ensuring true overheat protection. Generic snap-discs with the wrong rating can shut the furnace down prematurely or fail to protect it.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (2\/5)\u003c\/strong\u003e — Power down the furnace, remove the two mounting screws, transfer the wire leads to the matching terminals, and remount flush against the mounting surface for accurate sensing. Confirm continuity with a meter after install.\u003c\/p\u003e\u003cp\u003eFits the AMES920805CNAA and related Goodman\/Amana models. Verify the original part number and temperature rating before ordering.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057594286451,"sku":"GOODMAN-4743","price":8.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-150-f-primary-limit-switch-ames920805cnaa-20162903","provider":"National HVAC Parts","version":"1.0","type":"link"}