{"product_id":"oem-goodman-m4-primary-high-limit-switch-for-amh80704bxcc-20162906","title":"OEM Goodman M4 Primary High Limit Switch for AMH80704BXCC — 20162906","description":"\u003ch2\u003eGoodman 20162906 M4 Primary High Limit Switch\u003c\/h2\u003e\n\u003cp\u003eThe Goodman 20162906 is a genuine OEM M4 primary high limit switch for the Amana\/Goodman \u003cstrong\u003eAMH80704BXCC\u003c\/strong\u003e 80,000 BTU gas furnace. Mounted on the heat exchanger bulkhead, this auto-reset control continuously monitors supply-air temperature and opens the gas valve circuit if the furnace overheats — the primary defense against a cracked heat exchanger, restricted airflow, or a failed blower. When the plenum cools, the switch automatically resets and normal operation resumes.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: M4 primary high limit, auto-reset (bimetal disc)\u003c\/li\u003e\n\u003cli\u003eFunction: Normally closed overheat safety cutout\u003c\/li\u003e\n\u003cli\u003eFactory-calibrated trip temperature for AMH80704BXCC\u003c\/li\u003e\n\u003cli\u003eConnection: 1\/4\" quick-connect terminals\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: 20162906\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\n\u003cp\u003eThe OEM 20162906 arrives pre-calibrated to your furnace's exact limit temperature and bolt pattern. Generic replacements often differ in trip point or mounting, leading to nuisance shutdowns or inadequate overheat protection. For a primary safety control, we strongly recommend the genuine OEM part.\u003c\/p\u003e\n\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEasy — DIY friendly (10–15 min).\u003c\/strong\u003e Disconnect power, unplug the two spade terminals, remove the two mounting screws, and install the new limit in the same orientation. If the old limit was tripping, check airflow, filters, and blower operation before restarting.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057614537075,"sku":"GOODMAN-20162906","price":22.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-high-limit-switch-for-amh80704bxcc-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}