{"product_id":"oem-goodman-primary-limit-switch-for-ames800403axaa-20162901","title":"OEM Goodman Primary Limit Switch for AMES800403AXAA — 20162901","description":"\u003cp\u003eThe Goodman \u003cstrong\u003e20162901 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM high-limit control for the Amana\/Goodman \u003cstrong\u003eAMES800403AXAA\u003c\/strong\u003e 80% AFUE single-stage gas furnace. Mounted on the heat exchanger partition, this normally-closed thermal switch monitors supply-air temperature and interrupts the burners if the furnace overheats — protecting the heat exchanger from damage caused by restricted airflow, a dirty filter, a failed blower, or closed registers. As an auto-reset limit, it re-closes once temperatures return to normal, but repeated tripping points to an airflow fault that must be corrected.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eGenuine OEM Goodman\/Amana part number 20162901\u003c\/li\u003e\n\u003cli\u003eDirect fit for AMES800403AXAA and compatible AMES80 \/ GMES80 series furnaces\u003c\/li\u003e\n\u003cli\u003eAuto-reset, normally-closed disc limit with factory-set open temperature\u003c\/li\u003e\n\u003cli\u003ePrimary overheat protection for the heat exchanger and blower compartment\u003c\/li\u003e\n\u003cli\u003eCorrect trip point and probe length for accurate high-limit sensing\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM version\u003c\/strong\u003e matches the factory trip temperature and probe insertion depth exactly — essential for a safety limit that must open at the certified setpoint. The \u003cstrong\u003egeneric version\u003c\/strong\u003e is a spec-matched equivalent at a lower price. For safety-critical high-limit controls we recommend OEM; both ship new and calibrated.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Easy\u003c\/h3\u003e\u003cp\u003eRated \u003cstrong\u003eEasy (~20 minutes)\u003c\/strong\u003e. Turn off gas and power, remove the two mounting screws, transfer the wire leads, and reinstall with the sensing element seated correctly in the airstream. If the new limit still trips, diagnose airflow first — replace the filter, verify blower operation, and check duct static — before assuming a component failure.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057590026611,"sku":"GOODMAN-20162901","price":26.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-primary-limit-switch-for-ames800403axaa-20162901","provider":"National HVAC Parts","version":"1.0","type":"link"}