{"product_id":"oem-goodman-150-f-primary-limit-switch-for-amss920403anaa-20162903","title":"OEM Goodman 150°F Primary Limit Switch for AMSS920403ANAA — 20162903","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman 20162903 Primary Limit Switch\u003c\/strong\u003e is a genuine OEM 150°F high-limit safety control for the \u003cstrong\u003eAMSS920403ANAA\u003c\/strong\u003e 92% single-stage gas furnace and compatible Goodman\/Amana models. Mounted on the heat-exchanger bulkhead, this auto-reset switch monitors supply-air temperature and cuts the gas valve if the plenum overheats — protecting the heat exchanger from cracking when airflow is restricted by a dirty filter, blocked ducts, or a failing blower.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart Type: Primary High-Limit Switch\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: 20162903\u003c\/li\u003e\n\u003cli\u003eTrip Temperature: 150°F (auto-reset on cool-down)\u003c\/li\u003e\n\u003cli\u003eFits: Goodman \u0026amp; Amana AMSS920403ANAA and related 92% furnaces\u003c\/li\u003e\n\u003cli\u003eAction: Normally closed, opens on overtemperature\u003c\/li\u003e\n\u003cli\u003eTerminals: 1\/4 in. quick-connect spade\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe 150°F setpoint is matched to this furnace's heat-exchanger design. A generic limit with a different trip point will either short-cycle the burners or allow the plenum to run dangerously hot. For heat-exchanger protection, the calibrated OEM 20162903 is the correct choice.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eModerate (2\/5).\u003c\/strong\u003e Cut power and gas, disconnect the two spade terminals, remove the mounting screws, and install the new switch in the same position against the bulkhead. Confirm normal cycling on restart. If furnace wiring is unfamiliar, use a licensed HVAC technician.\u003c\/p\u003e\u003cp\u003eFast shipping and a 30-day return policy. Safeguard your heat exchanger with the genuine Goodman 20162903 primary limit switch.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057140023667,"sku":"GOODMAN-20162903","price":22.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-150-f-primary-limit-switch-for-amss920403anaa-20162903","provider":"National HVAC Parts","version":"1.0","type":"link"}