{"product_id":"oem-goodman-120-f-auxiliary-limit-switch-for-dms80904bna-b1370155","title":"OEM Goodman 120°F Auxiliary Limit Switch for DMS80904BNA — B1370155","description":"\u003cp\u003eThe Goodman \u003cstrong\u003eB1370155 Auxiliary Limit Switch\u003c\/strong\u003e is an OEM overheat-protection control for the \u003cstrong\u003eDMS80904BNA\u003c\/strong\u003e furnace and compatible Goodman\/Amana models. Positioned near the blower deck, this auto-reset switch opens at \u003cstrong\u003e120°F\u003c\/strong\u003e to interrupt the heating cycle when airflow across the heat exchanger is restricted — protecting components from thermal damage caused by a dirty filter, blocked returns, or a failing blower.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTrip temperature: 120°F (open on rise)\u003c\/li\u003e\n\u003cli\u003eReset type: Automatic reset\u003c\/li\u003e\n\u003cli\u003eContact configuration: Normally closed (N.C.)\u003c\/li\u003e\n\u003cli\u003eFunction: Auxiliary \/ secondary high-limit protection\u003c\/li\u003e\n\u003cli\u003eFits: Goodman\/Amana DMS80904BNA and compatible furnaces\u003c\/li\u003e\n\u003cli\u003eOEM part number: B1370155\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eGenuine \u003cstrong\u003eOEM\u003c\/strong\u003e switches are calibrated to the exact temperature and reset behavior your furnace's control board expects. Generic substitutes with the wrong trip point can cause short-cycling or fail to protect the unit. Because this is a safety limit, we recommend OEM for reliable, code-correct operation.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5).\u003c\/strong\u003e Disconnect furnace power, note the two wire terminals, remove the mounting screw(s), and install the replacement in the same orientation. Typical replacement time is 10–15 minutes. Repeated tripping usually points to an airflow problem — check the filter and blower before assuming a bad switch.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058040521075,"sku":"GOODMAN-B1370155","price":21.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-120-f-auxiliary-limit-switch-for-dms80904bna-b1370155","provider":"National HVAC Parts","version":"1.0","type":"link"}