{"product_id":"oem-goodman-120-f-auxiliary-limit-switch-for-ams80903bna-b1370155","title":"OEM Goodman 120°F Auxiliary Limit Switch for AMS80903BNA — B1370155","description":"\u003ch2\u003eGoodman B1370155 Auxiliary Limit Switch (120°F)\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eB1370155\u003c\/strong\u003e is a genuine OEM auxiliary high-limit switch for the Goodman\/Amana \u003cstrong\u003eAMS80903BNA\u003c\/strong\u003e furnace and related 80% AFUE models. Typically located on the blower deck or heat-exchanger housing, this low-temperature auxiliary limit adds a secondary layer of overheat protection: if airflow is restricted or the blower fails, the switch opens the control circuit and shuts down the burners before temperatures reach a damaging level. A furnace that short-cycles on limit or fails to heat is a common sign of a tripped or worn auxiliary limit.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTrip temperature: \u003cstrong\u003e120°F (open-on-rise)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eReset type: Auto-reset (closes on cool-down)\u003c\/li\u003e\n\u003cli\u003eCircuit: Normally closed auxiliary limit\u003c\/li\u003e\n\u003cli\u003eMount: Blower housing \/ heat-exchanger deck\u003c\/li\u003e\n\u003cli\u003eFits: Goodman \u0026amp; Amana AMS80903BNA and compatible 80% furnaces\u003c\/li\u003e\n\u003cli\u003eBrand: Genuine Goodman OEM\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM B1370155\u003c\/strong\u003e is matched to the precise 120°F set point and mounting footprint required for this cabinet. Generic replacements with approximate ratings can trip early, leaving customers cold, or trip late, defeating the safety function. Choose OEM for correct auto-reset behavior and drop-in fit.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy (1\/5).\u003c\/strong\u003e De-energize the furnace, pull the two spade connectors, remove the mounting screws, and swap in the new switch. About 10–15 minutes. Inspect for airflow restrictions (dirty filter, closed registers) that may have caused the trip.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057704616307,"sku":"GOODMAN-7031","price":11.96,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-120-f-auxiliary-limit-switch-for-ams80903bna-b1370155","provider":"National HVAC Parts","version":"1.0","type":"link"}