{"product_id":"lennox-619559-01-defrost-control-board-kit-genuine-oem-heat-pump-defrost-control-board","title":"Lennox 619559-01 Defrost Control Board Kit – Genuine OEM Heat Pump Defrost Control Board","description":"\u003ch1 data-start=\"94\" data-end=\"484\"\u003eLennox 619559-01 Defrost Control Board Kit – Genuine OEM Heat Pump Defrost Control Board\u003c\/h1\u003e\n\u003cp data-start=\"94\" data-end=\"484\"\u003eThe Lennox 619559-01 Defrost Control Board Kit is a genuine OEM heat pump defrost control board engineered to manage outdoor coil defrost cycles and system operation in residential HVAC heat pump systems. Designed to monitor outdoor operating conditions and control automatic defrost sequencing, this control board helps maintain efficient heating performance during cold weather operation.\u003c\/p\u003e\n\u003cp data-start=\"486\" data-end=\"886\"\u003eBuilt to OEM specifications for exact compatibility and dependable long-term operation, the 619559-01 defrost control board provides reliable communication between outdoor components while protecting the heat pump system from excessive frost accumulation. Its factory-programmed design ensures proper defrost timing, compressor operation, and system efficiency in compatible Lennox heat pump systems.\u003c\/p\u003e\n\u003chr data-start=\"888\" data-end=\"891\"\u003e\n\u003ch2 data-section-id=\"1ybcqkm\" data-start=\"893\" data-end=\"922\"\u003eKey Features and Function:\u003c\/h2\u003e\n\u003cp data-start=\"924\" data-end=\"1307\"\u003e• \u003cstrong data-start=\"926\" data-end=\"961\"\u003eAutomatic Defrost Cycle Control\u003c\/strong\u003e – Regulates outdoor coil defrost operation for heat pump efficiency\u003cbr data-start=\"1029\" data-end=\"1032\"\u003e• \u003cstrong data-start=\"1034\" data-end=\"1063\"\u003eGenuine OEM Compatibility\u003c\/strong\u003e – Designed specifically for Lennox HVAC heat pump systems\u003cbr data-start=\"1121\" data-end=\"1124\"\u003e• \u003cstrong data-start=\"1126\" data-end=\"1158\"\u003eIntegrated System Protection\u003c\/strong\u003e – Helps prevent frost buildup and airflow restriction\u003cbr data-start=\"1212\" data-end=\"1215\"\u003e• \u003cstrong data-start=\"1217\" data-end=\"1242\"\u003eDirect-Fit OEM Design\u003c\/strong\u003e – Factory-compatible wiring and mounting simplify installation\u003c\/p\u003e\n\u003chr data-start=\"1309\" data-end=\"1312\"\u003e\n\u003ch2 data-section-id=\"1x3ymsk\" data-start=\"1314\" data-end=\"1356\"\u003eProduct Details and Key Specifications:\u003c\/h2\u003e\n\u003cp data-start=\"1358\" data-end=\"1870\"\u003e• \u003cstrong data-start=\"1360\" data-end=\"1376\"\u003ePart Number:\u003c\/strong\u003e 619559-01\u003cbr data-start=\"1386\" data-end=\"1389\"\u003e• \u003cstrong data-start=\"1391\" data-end=\"1410\"\u003eCatalog Number:\u003c\/strong\u003e 16V37\u003cbr data-start=\"1416\" data-end=\"1419\"\u003e• \u003cstrong data-start=\"1421\" data-end=\"1438\"\u003eManufacturer:\u003c\/strong\u003e Lennox (Genuine OEM)\u003cbr data-start=\"1459\" data-end=\"1462\"\u003e• \u003cstrong data-start=\"1464\" data-end=\"1478\"\u003ePart Type:\u003c\/strong\u003e Defrost Control Board Kit\u003cbr data-start=\"1504\" data-end=\"1507\"\u003e• \u003cstrong data-start=\"1509\" data-end=\"1525\"\u003eApplication:\u003c\/strong\u003e Residential Heat Pump Systems\u003cbr data-start=\"1555\" data-end=\"1558\"\u003e• \u003cstrong data-start=\"1560\" data-end=\"1573\"\u003eFunction:\u003c\/strong\u003e Controls Heat Pump Defrost Operation \u0026amp; Outdoor System Timing\u003cbr data-start=\"1634\" data-end=\"1637\"\u003e• \u003cstrong data-start=\"1639\" data-end=\"1656\"\u003eControl Type:\u003c\/strong\u003e Electronic Defrost Control Board\u003cbr data-start=\"1689\" data-end=\"1692\"\u003e• \u003cstrong data-start=\"1694\" data-end=\"1716\"\u003eInstallation Type:\u003c\/strong\u003e Direct OEM Replacement\u003cbr data-start=\"1739\" data-end=\"1742\"\u003e• \u003cstrong data-start=\"1744\" data-end=\"1766\"\u003eCompatible Brands:\u003c\/strong\u003e Lennox\u003cbr data-start=\"1773\" data-end=\"1776\"\u003e• \u003cstrong data-start=\"1778\" data-end=\"1807\"\u003eElectrical Compatibility:\u003c\/strong\u003e OEM Factory Matched\u003cbr data-start=\"1827\" data-end=\"1830\"\u003e• \u003cstrong data-start=\"1832\" data-end=\"1852\"\u003eShipping Weight:\u003c\/strong\u003e Approx. 1-3 lbs\u003c\/p\u003e\n\u003chr data-start=\"1872\" data-end=\"1875\"\u003e\n\u003ch2 data-section-id=\"1jny3cc\" data-start=\"1877\" data-end=\"1957\"\u003e🛠️ HVAC Depot Pro Tip: Inspect the Defrost Sensor Before Replacing the Board\u003c\/h2\u003e\n\u003cp data-start=\"1959\" data-end=\"2293\"\u003eA failed defrost cycle is not always caused by the control board itself. Before replacing the board, inspect the defrost sensor, outdoor coil thermistor, reversing valve operation, and low-voltage wiring for damage or corrosion. Frost buildup caused by airflow restrictions or refrigerant issues can also mimic board failure symptoms.\u003c\/p\u003e\n\u003chr data-start=\"2295\" data-end=\"2298\"\u003e\n\u003ch2 data-section-id=\"1rctmzz\" data-start=\"2300\" data-end=\"2335\"\u003eCross-Reference \u0026amp; Compatibility:\u003c\/h2\u003e\n\u003cp data-start=\"2337\" data-end=\"2417\"\u003eThe Lennox 619559-01 is a direct OEM replacement for the following applications:\u003c\/p\u003e\n\u003cp data-start=\"2419\" data-end=\"2630\"\u003e• \u003cstrong data-start=\"2421\" data-end=\"2437\"\u003eOEM Numbers:\u003c\/strong\u003e 619559-01\u003cbr data-start=\"2447\" data-end=\"2450\"\u003e• \u003cstrong data-start=\"2452\" data-end=\"2471\"\u003eCatalog Number:\u003c\/strong\u003e 16V37\u003cbr data-start=\"2477\" data-end=\"2480\"\u003e• \u003cstrong data-start=\"2482\" data-end=\"2504\"\u003eCompatible Brands:\u003c\/strong\u003e Lennox\u003cbr data-start=\"2511\" data-end=\"2514\"\u003e• \u003cstrong data-start=\"2516\" data-end=\"2537\"\u003eApplication Type:\u003c\/strong\u003e Heat Pump Defrost Control Boards\u003cbr data-start=\"2570\" data-end=\"2573\"\u003e• \u003cstrong data-start=\"2575\" data-end=\"2591\"\u003eBoard Style:\u003c\/strong\u003e Electronic Defrost Control Board Kit\u003c\/p\u003e\n\u003chr data-start=\"2632\" data-end=\"2635\"\u003e\n\u003ch2 data-section-id=\"9l9x9z\" data-start=\"2637\" data-end=\"2675\"\u003eExtensive Model Compatibility List:\u003c\/h2\u003e\n\u003ch3 data-section-id=\"quun8f\" data-start=\"2677\" data-end=\"2716\"\u003eCompatible Lennox Heat Pump Series:\u003c\/h3\u003e\n\u003cp data-start=\"2718\" data-end=\"2989\"\u003e• XP Series Heat Pumps\u003cbr data-start=\"2740\" data-end=\"2743\"\u003e• Elite Series Heat Pumps\u003cbr data-start=\"2768\" data-end=\"2771\"\u003e• Merit Series Heat Pumps\u003cbr data-start=\"2796\" data-end=\"2799\"\u003e• Residential Split-System Heat Pumps\u003cbr data-start=\"2836\" data-end=\"2839\"\u003e• High-Efficiency Heat Pump Systems\u003cbr data-start=\"2874\" data-end=\"2877\"\u003e• Outdoor Condensing Units\u003cbr data-start=\"2903\" data-end=\"2906\"\u003e• Select Lennox Residential HVAC Systems\u003cbr data-start=\"2946\" data-end=\"2949\"\u003e• Select Lennox Heat Pump Applications\u003c\/p\u003e\n\u003cp data-start=\"2991\" data-end=\"3105\"\u003e\u003cem data-start=\"2991\" data-end=\"3105\"\u003eAlways verify part number, wiring configuration, sensor compatibility, and control board layout before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":53303168991595,"sku":"66255152876","price":212.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/619559-01.jpg?v=1779902768","url":"https:\/\/tophvacparts.com\/products\/lennox-619559-01-defrost-control-board-kit-genuine-oem-heat-pump-defrost-control-board","provider":"HVAC Parts and Equipment Depot: Homeowners \u0026 Contractors Welcome | Plano, TX","version":"1.0","type":"link"}