{"product_id":"oem-goodman-primary-limit-switch-for-amh80803bnbb-20162904","title":"OEM Goodman Primary Limit Switch for AMH80803BNBB — 20162904","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 20162904 Primary Limit Temperature Control\u003c\/strong\u003e is a genuine OEM safety switch engineered for the \u003cstrong\u003eAMH80803BNBB\u003c\/strong\u003e gas furnace and compatible Goodman\/Amana 80% AFUE models. Mounted on the heat exchanger vestibule panel, the primary limit continuously monitors supply-air temperature and opens the gas valve\/ignition circuit if the furnace overheats — typically from a dirty filter, blocked ductwork, or a failed blower. A tripping or failed limit is one of the most common causes of intermittent no-heat and short-cycling complaints.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart type: Primary high-limit temperature control (auto-reset snap-disc)\u003c\/li\u003e\n\u003cli\u003eFits: Goodman \/ Amana AMH80803BNBB and related 80% AFUE upflow\/horizontal furnaces\u003c\/li\u003e\n\u003cli\u003eFunction: Opens control circuit on over-temperature, closes on cool-down\u003c\/li\u003e\n\u003cli\u003eMounting: Factory limit bracket on heat exchanger panel\u003c\/li\u003e\n\u003cli\u003eType: Direct OEM replacement — no rewiring required\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis is the \u003cstrong\u003egenuine Goodman OEM part (20162904)\u003c\/strong\u003e with the exact trip and reset set-points calibrated for your furnace's heat exchanger. Generic aftermarket limits often use approximate temperature ratings that can nuisance-trip or, worse, fail to open at the correct threshold — a safety concern. For a temperature-critical safety control we recommend the OEM part.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate — 2 of 5.\u003c\/strong\u003e Requires removing the burner\/control panel, disconnecting two spade terminals, and unscrewing the limit bracket. Always shut off gas and 120V power at the disconnect before servicing. If you are not comfortable working near the gas valve and heat exchanger, have a licensed HVAC technician perform the swap.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057135370611,"sku":"GOODMAN-20162904","price":35.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-primary-limit-switch-for-amh80803bnbb-20162904","provider":"National HVAC Parts","version":"1.0","type":"link"}