{"product_id":"lennox-71w44-limit-control-switch-genuine-oem-furnace-limit-safety-control-145-f-open-115-f-reset","title":"Lennox 71W44 Limit Control Switch – Genuine OEM Furnace Limit Safety Control 145°F Open \/ 115°F Reset","description":"\u003ch1\u003eLennox 102857-04 Limit Control Switch – Genuine OEM Furnace Limit Safety Control 145°F Open \/ 115°F Reset\u003c\/h1\u003e\n\u003cp data-start=\"111\" data-end=\"526\"\u003eThe Lennox 102857-04 Limit Control Switch is a genuine OEM furnace safety limit control designed to protect residential HVAC heating systems from overheating conditions. Engineered to actuate at 145°F and automatically reset at 115°F, this safety switch helps maintain safe furnace operation by interrupting the heating cycle if excessive temperatures are detected inside the furnace cabinet or heat exchanger area.\u003c\/p\u003e\n\u003cp data-start=\"528\" data-end=\"928\"\u003eBuilt to OEM specifications for reliable compatibility and dependable long-term operation, the 102857-04 limit control features a blue sleeve identification marker, left orientation design, and a 5-inch overall length (OAL) for direct replacement installation in Lennox furnace systems. Its automatic reset functionality helps restore normal furnace operation once safe operating temperatures return.\u003c\/p\u003e\n\u003chr data-start=\"930\" data-end=\"933\"\u003e\n\u003ch2 data-section-id=\"1ybcqkm\" data-start=\"935\" data-end=\"964\"\u003eKey Features and Function:\u003c\/h2\u003e\n\u003cp data-start=\"966\" data-end=\"1327\"\u003e• \u003cstrong data-start=\"968\" data-end=\"999\"\u003eOverheat Furnace Protection\u003c\/strong\u003e – Opens at 145°F to prevent unsafe temperature conditions\u003cbr data-start=\"1057\" data-end=\"1060\"\u003e• \u003cstrong data-start=\"1062\" data-end=\"1090\"\u003eAutomatic Reset Function\u003c\/strong\u003e – Resets at 115°F after temperatures normalize\u003cbr data-start=\"1137\" data-end=\"1140\"\u003e• \u003cstrong data-start=\"1142\" data-end=\"1171\"\u003eGenuine OEM Compatibility\u003c\/strong\u003e – Designed specifically for Lennox furnace systems\u003cbr data-start=\"1222\" data-end=\"1225\"\u003e• \u003cstrong data-start=\"1227\" data-end=\"1260\"\u003eDirect-Fit Safety Replacement\u003c\/strong\u003e – Left orientation and 5\" OAL for OEM installation compatibility\u003c\/p\u003e\n\u003chr data-start=\"1329\" data-end=\"1332\"\u003e\n\u003ch2 data-section-id=\"1x3ymsk\" data-start=\"1334\" data-end=\"1376\"\u003eProduct Details and Key Specifications:\u003c\/h2\u003e\n\u003cp data-start=\"1378\" data-end=\"1901\"\u003e• \u003cstrong data-start=\"1380\" data-end=\"1396\"\u003ePart Number:\u003c\/strong\u003e 102857-04\u003cbr data-start=\"1406\" data-end=\"1409\"\u003e• \u003cstrong data-start=\"1411\" data-end=\"1430\"\u003eCatalog Number:\u003c\/strong\u003e 71W44\u003cbr data-start=\"1436\" data-end=\"1439\"\u003e• \u003cstrong data-start=\"1441\" data-end=\"1458\"\u003eManufacturer:\u003c\/strong\u003e Lennox (Genuine OEM)\u003cbr data-start=\"1479\" data-end=\"1482\"\u003e• \u003cstrong data-start=\"1484\" data-end=\"1498\"\u003ePart Type:\u003c\/strong\u003e Furnace Limit Control Switch (STILT)\u003cbr data-start=\"1535\" data-end=\"1538\"\u003e• \u003cstrong data-start=\"1540\" data-end=\"1566\"\u003eActuation Temperature:\u003c\/strong\u003e 145°F\u003cbr data-start=\"1572\" data-end=\"1575\"\u003e• \u003cstrong data-start=\"1577\" data-end=\"1599\"\u003eReset Temperature:\u003c\/strong\u003e 115°F\u003cbr data-start=\"1605\" data-end=\"1608\"\u003e• \u003cstrong data-start=\"1610\" data-end=\"1627\"\u003eSleeve Color:\u003c\/strong\u003e Blue\u003cbr data-start=\"1632\" data-end=\"1635\"\u003e• \u003cstrong data-start=\"1637\" data-end=\"1653\"\u003eOrientation:\u003c\/strong\u003e Left\u003cbr data-start=\"1658\" data-end=\"1661\"\u003e• \u003cstrong data-start=\"1663\" data-end=\"1688\"\u003eOverall Length (OAL):\u003c\/strong\u003e 5 Inches\u003cbr data-start=\"1697\" data-end=\"1700\"\u003e• \u003cstrong data-start=\"1702\" data-end=\"1718\"\u003eApplication:\u003c\/strong\u003e Furnace High Limit Safety Protection\u003cbr data-start=\"1755\" data-end=\"1758\"\u003e• \u003cstrong data-start=\"1760\" data-end=\"1773\"\u003eFunction:\u003c\/strong\u003e Opens on High Temperature \/ Auto Reset Safety Control\u003cbr data-start=\"1827\" data-end=\"1830\"\u003e• \u003cstrong data-start=\"1832\" data-end=\"1854\"\u003eCompatible Brands:\u003c\/strong\u003e Lennox\u003cbr data-start=\"1861\" data-end=\"1864\"\u003e• \u003cstrong data-start=\"1866\" data-end=\"1886\"\u003eShipping Weight:\u003c\/strong\u003e Approx. 1 lb\u003c\/p\u003e\n\u003chr data-start=\"1903\" data-end=\"1906\"\u003e\n\u003ch2 data-section-id=\"z4bqw4\" data-start=\"1908\" data-end=\"1993\"\u003e🛠️ HVAC Depot Pro Tip: Check Airflow Restrictions Before Replacing a Limit Switch\u003c\/h2\u003e\n\u003cp data-start=\"1995\" data-end=\"2301\"\u003eA failed limit control switch is often caused by restricted airflow conditions such as dirty filters, blocked vents, clogged evaporator coils, or blower motor problems. Before replacing the limit switch, inspect the entire airflow system to prevent repeated overheating and premature safety switch failure.\u003c\/p\u003e\n\u003chr data-start=\"2303\" data-end=\"2306\"\u003e\n\u003ch2 data-section-id=\"1rctmzz\" data-start=\"2308\" data-end=\"2343\"\u003eCross-Reference \u0026amp; Compatibility:\u003c\/h2\u003e\n\u003cp data-start=\"2345\" data-end=\"2425\"\u003eThe Lennox 102857-04 is a direct OEM replacement for the following applications:\u003c\/p\u003e\n\u003cp data-start=\"2427\" data-end=\"2642\"\u003e• \u003cstrong data-start=\"2429\" data-end=\"2445\"\u003eOEM Numbers:\u003c\/strong\u003e 102857-04\u003cbr data-start=\"2455\" data-end=\"2458\"\u003e• \u003cstrong data-start=\"2460\" data-end=\"2479\"\u003eCatalog Number:\u003c\/strong\u003e 71W44\u003cbr data-start=\"2485\" data-end=\"2488\"\u003e• \u003cstrong data-start=\"2490\" data-end=\"2512\"\u003eCompatible Brands:\u003c\/strong\u003e Lennox\u003cbr data-start=\"2519\" data-end=\"2522\"\u003e• \u003cstrong data-start=\"2524\" data-end=\"2545\"\u003eApplication Type:\u003c\/strong\u003e Furnace High Limit Safety Controls\u003cbr data-start=\"2580\" data-end=\"2583\"\u003e• \u003cstrong data-start=\"2585\" data-end=\"2602\"\u003eSwitch Style:\u003c\/strong\u003e Automatic Reset Limit Control (STILT)\u003c\/p\u003e\n\u003chr data-start=\"2644\" data-end=\"2647\"\u003e\n\u003ch2 data-section-id=\"9l9x9z\" data-start=\"2649\" data-end=\"2687\"\u003eExtensive Model Compatibility List:\u003c\/h2\u003e\n\u003ch3 data-section-id=\"xlvbuf\" data-start=\"2689\" data-end=\"2726\"\u003eCompatible Lennox Furnace Series:\u003c\/h3\u003e\n\u003cp data-start=\"2728\" data-end=\"2981\"\u003e• G40 Series Furnaces\u003cbr data-start=\"2749\" data-end=\"2752\"\u003e• G50 Series Furnaces\u003cbr data-start=\"2773\" data-end=\"2776\"\u003e• G60 Series Furnaces\u003cbr data-start=\"2797\" data-end=\"2800\"\u003e• Elite Series Gas Furnaces\u003cbr data-start=\"2827\" data-end=\"2830\"\u003e• Merit Series Furnaces\u003cbr data-start=\"2853\" data-end=\"2856\"\u003e• High-Efficiency Lennox Furnaces\u003cbr data-start=\"2889\" data-end=\"2892\"\u003e• Residential Gas Heating Systems\u003cbr data-start=\"2925\" data-end=\"2928\"\u003e• Select Lennox Furnace Safety Control Applications\u003c\/p\u003e\n\u003cp data-start=\"2983\" data-end=\"3086\"\u003e\u003cem data-start=\"2983\" data-end=\"3086\"\u003eAlways verify temperature ratings, orientation, wire connections, and overall length before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":53295345271147,"sku":"66255141543","price":69.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/71W44.jpg?v=1779829307","url":"https:\/\/tophvacparts.com\/products\/lennox-71w44-limit-control-switch-genuine-oem-furnace-limit-safety-control-145-f-open-115-f-reset","provider":"HVAC Parts and Equipment Depot: Homeowners \u0026 Contractors Welcome | Plano, TX","version":"1.0","type":"link"}