{"product_id":"oem-goodman-m4-primary-limit-switch-for-amh80703axca-20162906","title":"OEM Goodman M4 Primary Limit Switch for AMH80703AXCA — 20162906","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 20162906 M4 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM high-limit safety control for the \u003cstrong\u003eAMH80703AXCA\u003c\/strong\u003e 80% AFUE gas furnace and compatible Goodman\/Amana models. Mounted on the heat-exchanger bulkhead, this primary limit continuously monitors supply-air temperature and opens the circuit to shut off the burners if the furnace overheats — protecting the heat exchanger from cracking due to restricted airflow, a dirty filter, or blower failure.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 20162906\u003c\/li\u003e\n\u003cli\u003ePart Type: M4 primary high-limit switch\u003c\/li\u003e\n\u003cli\u003eFunction: Normally-closed, opens on over-temperature\u003c\/li\u003e\n\u003cli\u003eReset: Automatic (recloses when cooled)\u003c\/li\u003e\n\u003cli\u003eFits: Goodman \u0026amp; Amana AMH80703AXCA furnaces\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman (Amana family)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003egenuine OEM 20162906\u003c\/strong\u003e ships with the exact trip temperature, insertion depth, and terminal layout required for this furnace. As a primary heat-exchanger safety, a wrong-spec generic limit can nuisance-trip on every cycle or fail to protect against overheating. OEM is the only safe choice for this control.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (2\/5)\u003c\/strong\u003e — Two screws and two spade terminals; note orientation and depth on removal. Turn off gas and power, and always check airflow\/filter to find the reason for any trip before replacing.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057611489651,"sku":"GOODMAN-5309","price":27.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-amh80703axca-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}