{"product_id":"oem-goodman-primary-limit-switch-for-ames920803bnaa-20162906","title":"OEM Goodman Primary Limit Switch for AMES920803BNAA — 20162906","description":"\u003ch2\u003eGoodman 20162906 M4 Primary Limit Switch\u003c\/h2\u003e\u003cp\u003eThe Goodman 20162906 is the OEM M4 primary high-limit switch engineered for the Amana \u003cstrong\u003eAMES920803BNAA\u003c\/strong\u003e gas furnace. This normally-closed thermal safety control monitors heat-exchanger and supply-plenum temperature and opens the ignition\/gas circuit if the furnace overheats — protecting the heat exchanger from cracking and preventing a fire hazard. If your furnace short-cycles on high heat, trips out on limit, or won't fire after an overheat event, a failed or fatigued primary limit switch is a common cause.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: Primary high-limit \/ thermal cutout switch (M4 series)\u003c\/li\u003e\n\u003cli\u003eAction: Normally closed, opens on temperature rise, auto-reset\u003c\/li\u003e\n\u003cli\u003eFit: Amana AMES920803BNAA and compatible Goodman\/Amana 92% AFUE furnaces\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: 20162906\u003c\/li\u003e\n\u003cli\u003eBrand: Goodman \/ Amana (Daikin)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis is a \u003cstrong\u003egenuine OEM Goodman part\u003c\/strong\u003e with the exact trip temperature and mounting footprint the furnace was designed around. Aftermarket universal limits may carry the wrong cut-out setpoint, which can cause nuisance trips or allow the furnace to run hotter than intended. For a safety-critical control we recommend the OEM switch. A tested generic equivalent is offered as a lower-cost alternative for experienced technicians who verify the setpoint.\u003c\/p\u003e\u003ch3\u003eInstall Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy — DIY-friendly (15–20 min).\u003c\/strong\u003e Shut off gas and 120V power, remove the two mounting screws and the spade wire connectors, then reverse to install. No specialty tools required, though a multimeter is useful to confirm continuity. Always de-energize the unit before servicing and confirm the replacement setpoint matches the original.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057593434483,"sku":"GOODMAN-4720","price":9.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-primary-limit-switch-for-ames920803bnaa-20162906","provider":"National HVAC Parts","version":"1.0","type":"link"}