{"product_id":"amana-b1370155-furnace-limit-safety-switch-oem-l120-30-fixed-setting","title":"Amana B1370155 Furnace Limit Safety Switch | OEM L120-30 Fixed Setting","description":"\u003ch1\u003eAmana B1370155 Furnace High Limit Safety Switch – Genuine OEM L120-30 Fixed Temperature\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eGoodman Amana B1370155 (L120-30)\u003c\/strong\u003e is a mission-critical safety \"brain\" designed to protect your furnace from catastrophic overheating. This fixed-temperature limit control monitors the heat exchanger’s internal environment; if temperatures exceed 120°F due to a blower failure or restricted airflow, the switch \"opens\" the electrical circuit to the gas valve, instantly killing the flame. Specifically engineered for \u003cstrong\u003eGoodman, Amana, and Janitrol\u003c\/strong\u003e furnace series, this sensor ensures the system remains within safe thermal operating limits. As a genuine OEM component, it features the precise bimetal sensitivity required to prevent heat exchanger warping and ensure your home remains safe from fire hazards. \u003c\/p\u003e\n\u003ch2\u003eKey Features and Function:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Thermal Management:\u003c\/strong\u003e Calibrated to trip at exactly 120°F and automatically reset when the temperature drops by 30°F (L120-30), ensuring a fail-safe heating cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine OEM Reliability\/Fitment:\u003c\/strong\u003e Features the exact insertion depth and mounting bracket geometry required for a \"drop-in\" installation in Goodman burner and blower partitions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCritical Safety Integration:\u003c\/strong\u003e Directly communicates with the furnace control board to trigger \"Limit Switch Open\" fault codes, allowing for rapid diagnostics.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Bimetal Build:\u003c\/strong\u003e Constructed with high-grade thermal discs designed to endure thousands of cycles without drifting from the factory temperature setpoint. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eProduct Details and Key Specifications:\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e B1370155 (Replaces B13701-55, 313745, B1370141)\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 Fixed Temperature Limit Control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart SKU\u003c\/strong\u003e: 076335072586\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Rating:\u003c\/strong\u003e Open: 120°F | Close: 90°F (30°F Differential)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 24 VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOrientation:\u003c\/strong\u003e Normally Closed (NC)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnector:\u003c\/strong\u003e 1\/4\" Male Quick-Connect Terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e 1 lb \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🛠️ HVAC Depot Pro Tip: The Airflow Audit\u003c\/h2\u003e\n\u003cp\u003eIf your furnace is \"tripping\" on the \u003cstrong\u003eB1370155 limit switch\u003c\/strong\u003e, the switch is likely doing its job, not failing. Before replacing it, perform a \u003cstrong\u003eDiagnostic Check\u003c\/strong\u003e on your airflow. A dirty air filter, blocked return vents, or a failing blower motor are the most common causes of high-limit trips. If the furnace fires for a few minutes and then shuts down while the blower is still running, check for a cracked heat exchanger or a clogged A-coil. Always verify the temperature stamped on the side of the old switch matches \"L120\" before installing the new one. \u003c\/p\u003e\n\u003ch2\u003eCross-Reference \u0026amp; Compatibility:\u003c\/h2\u003e\n\u003cp\u003eThe B1370155 is a direct OEM replacement for the following part numbers: \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ch3\u003e\u003cstrong\u003eOEM Numbers:\u003c\/strong\u003e\u003c\/h3\u003e\n B1370155, B13701-55, 313745, B1370141, B13701-41\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003e\u003cstrong\u003eTherm-O-Disc:\u003c\/strong\u003e\u003c\/h3\u003e\n 60T11, 313745, L120-30\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003e\u003cstrong\u003eWhite-Rodgers:\u003c\/strong\u003e\u003c\/h3\u003e\n 3L01-120\u003c\/li\u003e\n\u003cli\u003e\n\u003ch3\u003e\u003cstrong\u003eAftermarket Cross:\u003c\/strong\u003e\u003c\/h3\u003e\n ClimaTek B13701-55, Mars 39155 \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eExtensive Model Compatibility List:\u003c\/h2\u003e\n\u003cp\u003eNote: Use 'CTRL+F' to search for your specific model:\u003c\/p\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 GDS80403AX, GDS80603AX, GDS80804BX, GDS81005CX\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\u003eJanitrol GMP Series:\u003c\/strong\u003e GMP050-3, GMP075-3, GMP100-3, GMP125-4, GMP150-5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJanitrol GDT Series:\u003c\/strong\u003e GDT050-3, GDT075-3, GDT100-4, GDT115-5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGMC Units:\u003c\/strong\u003e Various legacy 80% and 90% AFUE furnace configurations. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Goodman","offers":[{"title":"Default Title","offer_id":52572362670443,"sku":"B1370155","price":19.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/B1370155_3546360a-3ed1-4984-923c-297b7acc40b3.jpg?v=1763413380","url":"https:\/\/tophvacparts.com\/products\/amana-b1370155-furnace-limit-safety-switch-oem-l120-30-fixed-setting","provider":"HVAC Parts and Equipment Depot Open To Homeowners and Contractors","version":"1.0","type":"link"}