{"product_id":"nealmart-50a55-474-furnace-control-board-replacement-for-white-rodgers-50a55-3797","title":"NEALMART 50A55-474 Furnace Control Board – Replacement for White-Rodgers 50A55-3797","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMeet the NEALMART 50A55-474 furnace control board, a robust replacement designed to slot into common single-stage furnaces that previously used White-Rodgers 50A55-3797. This board also serves as a replacement for Integrated Furnace Control boards CNT02891, CNT03799, and CNT02789, offering a familiar control setup while refreshing worn components. Whether you’re upgrading an aging system or restoring steady operation, this board aims to provide a solid foundation for reliable furnace control.\u003c\/p\u003e\n\n\u003ch3\u003eWhat it does\u003c\/h3\u003e\n\u003cp\u003ePowered by a microprocessor, this control continuously monitors the gas ignition sequence, inducer operation, and fan output. The result is responsive management of the ignition cycle and airflow, helping the furnace react to changing conditions in real time. While results can vary by installation, the board’s ongoing supervision is designed to support stable operation and safer startup sequences.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility and replacement scope\u003c\/h3\u003e\n\u003cp\u003eThe NEALMART 50A55-474 is compatible with multiple White-Rodgers configurations: 50A55-3797, 50A55-474, 50A55-476, and 50A55-571. It replaces older Integrated Furnace Control boards CNT02891, CNT03799, and CNT02789, making it a versatile option for aging equipment. This broad compatibility helps reduce the need for multiple part hunts when upgrading an older furnace model.\u003c\/p\u003e\n\n\u003ch3\u003eKey specifications and capabilities\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInput Voltage: 25 VAC, 50\/60 Hz\u003c\/li\u003e\n\u003cli\u003eMax Input Current at 25 VAC: 0.45 A\u003c\/li\u003e\n\u003cli\u003eRelay Loads: Valve 1.5 A at 25 VAC; Ignitor 6.0 A at 120 VAC; Inducer 2.2 FLA-3.5 LRA at 120 VAC; Circulator 14.5 FLA-25.0 LRA at 120 VAC\u003c\/li\u003e\n\u003cli\u003eSelf-monitoring: The board tracks essential functions and signals a failure code via LED when issues are detected\u003c\/li\u003e\n\u003cli\u003eRepair note: If internal failure occurs, the entire control should be replaced rather than repaired\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat to expect during use\u003c\/h3\u003e\n\u003cp\u003eWith microprocessor supervision, the control analyzes performance and signals when maintenance or replacement may be warranted. Expect a compact, integrated unit that supports ignition control and system monitoring, contributing to smoother operation and fewer unexpected shutdowns. Individual outcomes depend on the furnace model, installation quality, and surrounding components.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation tips and best practices\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBefore removing the old board, take a photo of the wiring layout for reference\u003c\/li\u003e\n\u003cli\u003eLabel wires and verify correct terminal alignment on the new board\u003c\/li\u003e\n\u003cli\u003eEnsure the power is off and the gas supply is safely managed during replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy choose NEALMART\u003c\/h3\u003e\n\u003cp\u003eNEALMART offers a practical replacement option with broad model coverage, diagnostic cues, and a support-focused approach to installation questions. This board is designed to slot into existing control architectures without requiring major changes to the furnace design.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What does the NEALMART 50A55-474 furnace control board replace?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: It replaces White-Rodgers 50A55-3797 and related CNT controllers, offering replacement compatibility for common single-stage furnaces.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What should I do before installing this control board?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Take a photo of the existing wiring and label terminals to improve fit; ensure power is off before removing the old board.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"NEALMART","offers":[{"title":"Default Title","offer_id":47468314165422,"sku":"B0CPP8G7HL","price":126.1,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/6012\/9710\/files\/nealmart-50a55-474-board-front.jpg?v=1770397958","url":"https:\/\/handyskook.ca\/products\/nealmart-50a55-474-furnace-control-board-replacement-for-white-rodgers-50a55-3797","provider":"HandySkook","version":"1.0","type":"link"}