{"product_id":"oem-goodman-primary-limit-switch-for-amh80403anbb-20162901","title":"OEM Goodman Primary Limit Switch for AMH80403ANBB — 20162901","description":"\u003ch2\u003eOEM Goodman 20162901 Primary Limit Switch\u003c\/h2\u003e\u003cp\u003eThe genuine Goodman \u003cstrong\u003e20162901\u003c\/strong\u003e primary limit switch is the main high-temperature safety control for the \u003cstrong\u003eAMH80403ANBB\u003c\/strong\u003e gas furnace. Mounted on the heat-exchanger bulkhead, it continuously monitors supply-plenum temperature and opens the burner circuit if the furnace overheats — typically due to a dirty filter, failing blower, or blocked ducting. A furnace that short-cycles on heat or shuts the burners down mid-cycle is often signaling a failed or nuisance-tripping primary limit.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart number: 20162901\u003c\/li\u003e\n\u003cli\u003eType: primary (auto-reset) high-limit switch\u003c\/li\u003e\n\u003cli\u003eFunction: opens burner circuit on plenum overtemperature, recloses when cooled\u003c\/li\u003e\n\u003cli\u003eFits: Goodman\/Amana AMH80403ANBB furnaces\u003c\/li\u003e\n\u003cli\u003eFactory-calibrated trip temperature for this model\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe 20162901 is calibrated to the specific open\/close temperatures Goodman engineered for this heat exchanger and blower pairing. An OEM part ensures correct cut-out timing and keeps the heat-exchanger warranty intact. Generic replacements with the wrong set point cause premature shutdowns or, worse, allow overheating. For the primary safety limit, OEM is the right call.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy\u003c\/strong\u003e — 15–25 minutes. Disconnect power, unplug the terminals, remove two mounting screws, and install the replacement in the same orientation. Never jumper the limit. If it keeps opening, correct the airflow restriction first.\u003c\/p\u003e\u003cp\u003eVerify the AMH80403ANBB model number before ordering to ensure the correct temperature rating.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057599725939,"sku":"GOODMAN-4927","price":26.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-primary-limit-switch-for-amh80403anbb-20162901","provider":"National HVAC Parts","version":"1.0","type":"link"}