{"product_id":"oem-goodman-amana-m4-primary-limit-switch-for-amec961004cnac-20162906","title":"OEM Goodman Amana M4 Primary Limit Switch for AMEC961004CNAC — 20162906","description":"\u003ch2\u003eGenuine Goodman\/Amana 20162906 M4 Primary Limit Switch\u003c\/h2\u003e\u003cp\u003eThe 20162906 M4 primary limit switch is a factory-original thermal safety control that monitors supply-air temperature in the heat-exchanger compartment of Goodman and Amana gas furnaces. If the furnace overheats — typically from restricted airflow such as a dirty filter or failed blower — the switch opens to shut off the burners, then automatically resets once temperatures return to normal. It is a direct-fit replacement for the \u003cstrong\u003eAMEC961004CNAC\u003c\/strong\u003e and related AMEC-series models.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart number: 20162906 (M4 series)\u003c\/li\u003e\n\u003cli\u003eType: Primary auto-reset high-limit switch\u003c\/li\u003e\n\u003cli\u003eReset: Automatic (self-resetting)\u003c\/li\u003e\n\u003cli\u003eFunction: Opens burner circuit on high supply-air temperature\u003c\/li\u003e\n\u003cli\u003eFits: Goodman \u0026amp; Amana AMEC961004CNAC furnace\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM 20162906\u003c\/strong\u003e is factory-calibrated to the correct trip and reset temperatures and matches the original mounting footprint. Generic replacements often differ in set-point or bracket, causing short-cycling or inadequate overheat protection. For a safety-rated primary limit, genuine OEM is the reliable choice.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eRating: Moderate (2\/5).\u003c\/strong\u003e Disconnect power, remove two mounting screws, transfer the spade terminals, and reinstall. Roughly 15 minutes. If the original limit was tripping, inspect the air filter, blower, and ductwork for restrictions before restarting.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057578787187,"sku":"GOODMAN-4293","price":9.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-amana-m4-primary-limit-switch-for-amec961004cnac-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}