{"product_id":"oem-goodman-120-f-auxiliary-limit-switch-for-ams80904bnaa-b1370155","title":"OEM Goodman 120°F Auxiliary Limit Switch for AMS80904BNAA — B1370155","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370155 Auxiliary Limit Switch\u003c\/strong\u003e is a genuine OEM 120°F auto-reset safety control for the \u003cstrong\u003eAMS80904BNAA\u003c\/strong\u003e furnace and compatible Goodman\/Amana models. Typically mounted on the blower deck or near the return air path, it monitors for abnormal heat build-up caused by restricted airflow — a dirty filter, closed dampers, or a failing blower — and interrupts the heating circuit to prevent overheating and nuisance heat exchanger stress.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eTrip temperature: 120°F (open on rise)\u003c\/li\u003e\n\u003cli\u003eType: Auto-reset auxiliary \/ high-limit switch\u003c\/li\u003e\n\u003cli\u003eFunction: Secondary overheat protection\u003c\/li\u003e\n\u003cli\u003eFits: AMS80904BNAA and compatible Goodman\/Amana furnaces\u003c\/li\u003e\n\u003cli\u003eTerminals: 1\/4 in. quick-connect spade\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThe \u003cstrong\u003eOEM Goodman B1370155\u003c\/strong\u003e is factory-set to the precise 120°F threshold matched to this cabinet's airflow design. Generic replacements often use approximate calibration and generic mounting, leading to short-cycling or delayed protection. For reliable, code-correct operation, choose OEM.\u003c\/p\u003e\u003ch3\u003eInstallation\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eDifficulty: Easy.\u003c\/strong\u003e Disconnect two spade terminals, remove the mounting screws, and swap in the new switch — roughly 10–15 minutes. \u003cem\u003eTurn off electrical power and gas before servicing.\u003c\/em\u003e If the switch was tripping, replace the air filter and verify blower airflow before restarting to avoid a repeat fault.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057705795955,"sku":"GOODMAN-7072","price":11.96,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-120-f-auxiliary-limit-switch-for-ams80904bnaa-b1370155","provider":"National HVAC Parts","version":"1.0","type":"link"}