{"product_id":"goodman-20162904s-genuine-oem-service-limit-switch-brown-7-probe","title":"Goodman 20162904S – Genuine OEM Service Limit Switch (Brown, 7\" Probe)","description":"\u003ch1\u003eGoodman 20162904S – Genuine OEM Service Limit Switch (Brown, 7\" Probe)\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eGoodman 20162904S\u003c\/strong\u003e is a high-precision \u003cstrong\u003eGenuine OEM Service Limit Switch\u003c\/strong\u003e designed for Goodman, Amana, and Janitrol gas furnaces. Easily identified by its distinct \u003cstrong\u003ebrown color code\u003c\/strong\u003e, this critical safety component monitors the heat exchanger’s internal temperature, automatically interrupting the heating cycle if temperatures exceed safe factory limits to prevent system damage. \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eTechnical Performance:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis switch features an extended \u003cstrong\u003e7-inch immersion probe\u003c\/strong\u003e, allowing it to reach deep into the furnace cabinet for accurate thermal sensing in high-capacity heat exchangers. As a \"normally closed\" safety device, it is engineered to open the 24V control circuit upon reaching its specific high-limit setpoint and utilizes an \u003cstrong\u003eautomatic reset\u003c\/strong\u003e function to restore furnace operation once the system has cooled to a safe temperature. \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features and Function:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature 1: Precision High-Limit Monitoring:\u003c\/strong\u003e Calibrated to protect the heat exchanger from cracks and overheating by breaking the ignition circuit instantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature 2: Extended 7-Inch Reach:\u003c\/strong\u003e The long probe design ensures the sensor is positioned in the \"hottest\" zone of the airflow for rapid response times.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature 3: Brown Color-Coded Housing:\u003c\/strong\u003e Specifically coded to ensure technicians install the correct temperature-rated switch for the furnace's BTU output.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature 4: Automatic Reset Logic:\u003c\/strong\u003e Once the blower cools the heat exchanger, the switch automatically closes, allowing the furnace to attempt a new heating cycle. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Details and Key Specifications:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 20162904S (Replaces 20162904, B13701-54)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Goodman \/ Amana (Genuine OEM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Service Limit Switch (High Limit)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor Code:\u003c\/strong\u003e Brown\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInsertion Length:\u003c\/strong\u003e 7.0 Inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Type:\u003c\/strong\u003e Flat Flange Mount\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReset Type:\u003c\/strong\u003e Automatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e 0.2 lbs \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🛠️ \u003cstrong\u003eHVAC Depot Pro Tip: The \"Why Did It Trip?\" Investigation\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003cp\u003eA limit switch rarely fails on its own; it usually trips because of an airflow issue. If you are replacing this switch, always check for a dirty air filter, a clogged secondary heat exchanger, or a failing blower motor capacitor. Replacing the switch without fixing the underlying airflow restriction will likely result in the new switch \"cycling\" and eventually failing as well. \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCross-Reference \u0026amp; Compatibility:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003e20162904S\u003c\/strong\u003e is a direct OEM replacement for the following part numbers: \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Numbers:\u003c\/strong\u003e 20162904, B13701-54, B1370154, 10123534\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustry Refs:\u003c\/strong\u003e L170-40F (Commonly used in 170-degree configurations) \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eExtensive Model Compatibility List:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoodman GMS8 Series:\u003c\/strong\u003e GMS80403AN, GMS80603AN, GMS80804BN, GMS81005CN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoodman GDS8 Series:\u003c\/strong\u003e GDS80403AN, GDS80603AN, GDS80804BN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmana AMES8 Series:\u003c\/strong\u003e AMES80403AN, AMES80603AN, AMES80804BN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackaged Units:\u003c\/strong\u003e GPG13, GPG14, APG13, APG14 Series\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":52572418900331,"sku":"193031468885","price":45.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/20162904S-2.jpg?v=1765993286","url":"https:\/\/tophvacparts.com\/products\/goodman-20162904s-genuine-oem-service-limit-switch-brown-7-probe","provider":"HVAC Parts and Equipment Depot Open To Homeowners and Contractors","version":"1.0","type":"link"}