{"product_id":"oem-goodman-170-f-primary-limit-switch-for-amh80904bxaa-b1370188","title":"OEM Goodman 170°F Primary Limit Switch for AMH80904BXAA — B1370188","description":"\u003cp\u003eThe OEM Goodman \u003cstrong\u003eB1370188 Primary Limit Switch\u003c\/strong\u003e is the main high-temperature safety control for the \u003cstrong\u003eAMH80904BXAA\u003c\/strong\u003e gas furnace and compatible Goodman\/Amana models. Mounted on the heat exchanger bulkhead, this normally-closed switch monitors supply-air temperature and opens at a 170°F cutout to de-energize the gas valve if the blower fails or airflow is restricted — preventing heat-exchanger damage and unsafe operating conditions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTrip temperature: 170°F cutout (auto-reset)\u003c\/li\u003e\n\u003cli\u003eConfiguration: Normally-closed (N.C.) thermal limit\u003c\/li\u003e\n\u003cli\u003eFunction: Primary high-limit safety control\u003c\/li\u003e\n\u003cli\u003eFits: Goodman\/Amana AMH80904BXAA and related 80% furnaces\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: B1370188\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003ePrimary limits must trip at exactly the temperature your furnace was designed around. This genuine Goodman part carries the factory 170°F calibration and correct mounting bracket, so it seats flush against the heat exchanger for accurate sensing. Generic substitutes with the wrong cutout can cause premature lockouts or, worse, fail to trip when needed.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty: Easy\u003c\/h3\u003e\u003cp\u003eRated \u003cstrong\u003eEasy\u003c\/strong\u003e. With power and gas off, remove the two mounting screws, unplug the two spade terminals, and install the replacement in reverse — about 15 minutes. Confirm the part number against your unit's wiring diagram and run a full heat cycle to verify proper operation. When in doubt, have a licensed HVAC professional perform the repair.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057633050995,"sku":"GOODMAN-5811","price":12.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-170-f-primary-limit-switch-for-amh80904bxaa-b1370188","provider":"National HVAC Parts","version":"1.0","type":"link"}