{"product_id":"oem-goodman-120-f-auxiliary-limit-switch-for-ams81405dna-b1370155","title":"OEM Goodman 120°F Auxiliary Limit Switch for AMS81405DNA — B1370155","description":"\u003cp\u003eThe \u003cstrong\u003eGoodman B1370155 Auxiliary Limit Switch\u003c\/strong\u003e is a genuine OEM temperature-limit safety control rated at \u003cstrong\u003e120°F\u003c\/strong\u003e, used on \u003cstrong\u003eGoodman AMS81405DNA\u003c\/strong\u003e gas furnaces and compatible models. Typically mounted near the blower or secondary heat-exchanger area, it monitors for abnormal temperature rise from restricted airflow — a dirty filter, blocked return, or failing blower — and interrupts the heating circuit to protect the furnace from overheating.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: Auxiliary \/ secondary limit switch\u003c\/li\u003e\n\u003cli\u003eTrip temperature: 120°F\u003c\/li\u003e\n\u003cli\u003eOEM Part Number: B1370155\u003c\/li\u003e\n\u003cli\u003eCompatible Model: AMS81405DNA (and select Goodman\/Amana furnaces)\u003c\/li\u003e\n\u003cli\u003eFunction: Normally closed, opens on over-temperature\u003c\/li\u003e\n\u003cli\u003eFit: Direct OEM replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM vs. Generic\u003c\/h3\u003e\u003cp\u003eThis \u003cstrong\u003egenuine Goodman OEM limit switch\u003c\/strong\u003e is matched to the furnace's exact 120°F setpoint and mounting footprint, so it protects at the temperature the engineers intended. Generic substitutes with the wrong trip point cause short-cycling or fail to trip when needed. As a safety device, OEM is strongly recommended.\u003c\/p\u003e\u003ch3\u003eInstallation Difficulty\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eEasy–Moderate (2\/5).\u003c\/strong\u003e Disconnect power, photograph and remove the wiring, unscrew the switch from its mounting location, install the new B1370155, and reconnect. Roughly 15 minutes. If the switch had tripped, check the filter and blower for airflow restrictions before restarting.\u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":63057722048883,"sku":"GOODMAN-7234","price":29.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-goodman-120-f-auxiliary-limit-switch-for-ams81405dna-b1370155","provider":"National HVAC Parts","version":"1.0","type":"link"}