{"product_id":"oem-goodman-primary-high-limit-switch-for-ams80403axad-20162901","title":"OEM Goodman Primary High Limit Switch for AMS80403AXAD — 20162901","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 20162901 Primary High Limit Switch\u003c\/strong\u003e is a genuine OEM safety control for the \u003cstrong\u003eAMS80403AXAD\u003c\/strong\u003e 80% AFUE gas furnace and compatible Goodman\/Amana models. Mounted on the heat-exchanger bulkhead, this auto-reset thermal switch opens the gas valve circuit if supply-air temperature climbs too high — protecting the heat exchanger from cracking due to restricted airflow, a failed blower, or a dirty filter. A failed limit switch typically shows up as short-cycling on heat or a furnace that will not fire at all.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFunction: Primary high-temperature limit \/ overheat cutout\u003c\/li\u003e\n\u003cli\u003eReset: Automatic (snap-disc)\u003c\/li\u003e\n\u003cli\u003eMounting: Factory bracket on heat-exchanger panel\u003c\/li\u003e\n\u003cli\u003eFits: AMS80403AXAD and compatible 80% AFUE furnaces\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: 20162901\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eOEM limits are calibrated to the exact open\/close temperature the furnace was certified for. A generic switch with the wrong trip point may nuisance-trip in normal operation or, worse, fail to protect the heat exchanger. Because this is a life-safety control, OEM is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (2\/5).\u003c\/strong\u003e Cut power at the disconnect, unplug the two spade terminals, remove the mounting screws, and swap in the new switch. Restore power and verify a normal heat cycle. Do not bypass a tripping limit — diagnose the airflow restriction first.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057683874163,"sku":"GOODMAN-6731","price":26.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-primary-high-limit-switch-for-ams80403axad-20162901","provider":"National HVAC Parts","version":"1.0","type":"link"}