{"product_id":"oem-goodman-120-f-auxiliary-limit-switch-for-gmnt045-3b-b1370155","title":"OEM Goodman 120°F Auxiliary Limit Switch for GMNT045-3B — B1370155","description":"\u003cp\u003eProtect your furnace with the genuine OEM Goodman \u003cstrong\u003eB1370155 Auxiliary Limit Switch\u003c\/strong\u003e, a direct-fit safety control for \u003cstrong\u003eGMNT045-3B\u003c\/strong\u003e and compatible Goodman and Amana gas furnaces. This auxiliary limit typically mounts on the blower housing to guard against overheating in the blower compartment — a common secondary protection point that supplements the primary limit on the heat exchanger.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTrip temperature:\u003c\/strong\u003e 120°F (auto-reset)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Normally closed, opens on rise\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset:\u003c\/strong\u003e Automatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Blower housing \/ return-air location\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Goodman\/Amana GMNT045-3B and compatible models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Part #:\u003c\/strong\u003e B1370155\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eOEM B1370155 arrives pre-calibrated to the 120°F auto-reset spec Goodman engineered for this furnace platform. Universal aftermarket limits frequently require you to match trip temperature by hand and may not seat flush in the factory bracket. Choosing OEM removes the guesswork and keeps the manufacturer's safety margins intact.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty: Easy (1\/5).\u003c\/strong\u003e Plan on 10–15 minutes. De-energize the furnace at the disconnect, unplug the two spade terminals, remove the mounting screws, swap in the new switch, and reconnect. Confirm the blower cycles normally on a test run. Repeated auxiliary-limit trips usually point to restricted airflow — check the filter, ductwork, and blower speed before assuming the switch has failed.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63058127880563,"sku":"GOODMAN-11626","price":24.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-120-f-auxiliary-limit-switch-for-gmnt045-3b-b1370155","provider":"National HVAC Parts","version":"1.0","type":"link"}