{"product_id":"oem-goodman-m4-primary-limit-switch-for-acvc961005cnba-20162906","title":"OEM Goodman M4 Primary Limit Switch for ACVC961005CNBA — 20162906","description":"\u003cp\u003eThe Goodman 20162906 M4 Primary Limit Switch is a genuine OEM high-limit safety control for the ACVC961005CNBA furnace and compatible Goodman\/Amana models. Mounted on the heat exchanger or burner partition, it monitors supply-air temperature and shuts off the gas valve if the furnace overheats — protecting the heat exchanger and your home from a runaway high-temperature condition.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part Number:\u003c\/strong\u003e 20162906\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Primary (high) limit switch, M4 series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Automatic-reset thermal overheat cutoff\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquipment:\u003c\/strong\u003e Furnace (gas)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Goodman ACVC961005CNBA and ACVC9 series\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eOEM vs. Generic:\u003c\/strong\u003e The limit's trip temperature and mounting geometry are matched to this specific furnace. A generic switch with the wrong setpoint can nuisance-trip (short cycling) or, worse, fail to open at the correct temperature — a safety risk. Genuine Goodman limits carry the factory calibration, ensuring the furnace shuts down exactly when it should.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstall Difficulty:\u003c\/strong\u003e Moderate (2\/5) — disconnect power, remove two mounting screws, transfer the wire connectors, and reinstall. A multimeter continuity check is recommended. When in doubt, use a licensed HVAC technician.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Direct Replacement","offer_id":63032473354611,"sku":"20162906-GEN","price":16.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048276377971,"sku":"20162906","price":22.04,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-limit-switch-snap-disc-20162906_9cf464b1-bd21-4acb-97f5-20c66bf37edc.jpg?v=1782949344","url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-m4-primary-limit-switch-for-acvc961005cnba-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}