{"product_id":"oem-goodman-m4-primary-limit-switch-for-amh80703axcc-20162906","title":"OEM Goodman M4 Primary Limit Switch for AMH80703AXCC — 20162906","description":"\u003ch2\u003eGoodman 20162906 M4 Primary Limit Switch\u003c\/h2\u003e\u003cp\u003eThe Goodman 20162906 is a genuine OEM M4 primary high-limit switch for the \u003cstrong\u003eAMH80703AXCC\u003c\/strong\u003e gas furnace and other compatible Goodman and Amana models. Mounted on the heat-exchanger bulkhead, this primary limit continuously monitors supply-plenum temperature and opens the control circuit to shut off the burners if the furnace overheats — typically from restricted airflow such as a clogged filter, a failed blower, or closed registers. It protects the heat exchanger and downstream ductwork from thermal damage and is a foundational safety control in the furnace's sequence of operation.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 20162906\u003c\/li\u003e\n\u003cli\u003eType: M4 primary high-limit switch\u003c\/li\u003e\n\u003cli\u003eFunction: Normally closed, opens on over-temperature (auto reset)\u003c\/li\u003e\n\u003cli\u003eMounting: Heat-exchanger \/ plenum bracket\u003c\/li\u003e\n\u003cli\u003eFits: Goodman \/ Amana AMH80703AXCC and compatible models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe OEM 20162906 is calibrated to the precise open\/close temperatures and disc size Goodman specifies for this model. A miscalibrated generic can nuisance-trip on normal cycles or, worse, fail to open during a genuine overheat. As a safety-critical component, this is a part to buy genuine.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Disconnect power, unplug the terminals, remove the two mounting screws, and install the new limit in the same orientation. If the old limit was tripping, correct the underlying airflow problem before restoring heat.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057612112243,"sku":"GOODMAN-5329","price":26.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-amh80703axcc-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}