{"product_id":"oem-goodman-primary-limit-switch-for-amh80403axbc-furnace-20162901","title":"OEM Goodman Primary Limit Switch for AMH80403AXBC Furnace — 20162901","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 20162901 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM high-limit temperature control for the \u003cstrong\u003eAMH80403AXBC\u003c\/strong\u003e gas furnace and compatible Goodman\/Amana models. Mounted on the heat-exchanger bulkhead, the primary limit monitors supply-air temperature and shuts off the burners if the furnace overheats — typically from a dirty filter, failed blower, or restricted airflow. This is an auto-reset control that re-closes once temperature returns to normal. A failed limit can cause short-cycling on the burners or a furnace that won't fire at all.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eOEM Part Number: 20162901\u003c\/li\u003e\n\u003cli\u003ePart Type: Primary High-Limit Switch\u003c\/li\u003e\n\u003cli\u003eFunction: Supply-air overheat cutout\u003c\/li\u003e\n\u003cli\u003eReset: Automatic\u003c\/li\u003e\n\u003cli\u003eFits: Goodman\/Amana AMH80403AXBC furnaces\u003c\/li\u003e\n\u003cli\u003eBrand: Genuine Goodman OEM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe genuine \u003cstrong\u003eOEM 20162901\u003c\/strong\u003e is matched to the exact trip temperature and mounting-bracket geometry of your furnace's heat exchanger. Generic limits with a different setpoint or footprint can nuisance-trip, mount incorrectly, or fail to protect the exchanger. For a primary safety limit, OEM calibration is essential.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Easy to Moderate\u003c\/h3\u003e\u003cp\u003eDisconnect power, photograph the wiring, remove the two mounting screws, transfer the spade terminals, and secure the new switch to the bulkhead. About 15 minutes. If the old limit was tripping, correct the underlying airflow problem — replace the filter and confirm blower operation — before restarting.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eAlways disconnect power and gas before servicing. Repeated limit trips indicate an airflow fault that should be diagnosed by a licensed HVAC technician.\u003c\/em\u003e\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057601200499,"sku":"GOODMAN-4984","price":44.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-primary-limit-switch-for-amh80403axbc-furnace-20162901","provider":"National HVAC Parts","version":"1.0","type":"link"}