{"product_id":"oem-goodman-120-f-auxiliary-limit-switch-for-dms80704bna-b1370155","title":"OEM Goodman 120°F Auxiliary Limit Switch for DMS80704BNA — B1370155","description":"\u003ch2\u003eGoodman B1370155 Auxiliary Limit Switch (120°F)\u003c\/h2\u003e\u003cp\u003eThe Goodman B1370155 is a genuine OEM auxiliary limit switch rated at 120°F, designed for the Goodman DMS80704BNA furnace and compatible models. Typically mounted in or near the blower compartment, this auxiliary high-limit switch guards against overheating caused by blower failure or severely restricted airflow. If temperatures climb past the safe threshold, the switch interrupts the control circuit and shuts the burners down, preventing heat-exchanger damage and unsafe operating conditions.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart number: B1370155\u003c\/li\u003e\n\u003cli\u003eType: Auxiliary high-limit switch\u003c\/li\u003e\n\u003cli\u003eTrip temperature: 120°F rating\u003c\/li\u003e\n\u003cli\u003eLocation: Blower \/ air-circulation compartment\u003c\/li\u003e\n\u003cli\u003eFits: Goodman DMS80704BNA and related furnaces\u003c\/li\u003e\n\u003cli\u003eFunction: Secondary overheat \/ airflow-loss safety protection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe OEM B1370155 is factory-calibrated to Goodman's specified 120°F auxiliary trip point and matched to the DMS80704BNA mounting location. Because it is a safety device, using a generic switch with a different rating risks nuisance shutdowns or, worse, failing to trip when needed. For overheat protection, always install the correctly rated OEM switch.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eRating: Easy (2\/5).\u003c\/strong\u003e Turn off power at the furnace, disconnect the wire terminals, remove the mounting screws, and fit the replacement in the same orientation. Roughly 15–20 minutes. If this limit had been tripping, confirm the blower runs correctly and check for dirty filters or blocked ducts before restoring normal operation.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058034721139,"sku":"GOODMAN-9589","price":11.96,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-120-f-auxiliary-limit-switch-for-dms80704bna-b1370155","provider":"National HVAC Parts","version":"1.0","type":"link"}