NORDYNE NORTEK Defrost Control Board OEM Replacement Kit 917178A

NORDYNE NORTEK Defrost Control Board OEM Replacement Kit 917178A

Keep your residential split-system heat pump running efficiently with the genuine Nordyne (Nortek) 917178A Defrost Control Board. This OEM replacement part is designed to precisely manage defrost cycles, preventing ice buildup on the outdoor coil during cold weather operation and ensuring optimal heating performance year-round.

Key Features

• Built-in 5-minute time delay — Anti-short cycle protection that safeguards the compressor and improves system reliability.
• Complete replacement kit — Includes the defrost control board, wiring harnesses, connectors, and a new drip hood kit for a hassle-free install.
• 24 VAC operation with reliable temperature monitoring for initiating defrost only when needed.
• Compact design with easy-to-follow wiring instructions included.
• Direct OEM replacement for older boards (cross-references: 917178, 624626, 624519, 621301, and others).

Benefits

• Restores proper defrost functionality to eliminate ice accumulation, reduced efficiency, and potential system damage.
• Improves overall heat pump reliability and energy efficiency.
• Quick and straightforward installation — perfect for DIYers or HVAC technicians.
• High-quality OEM component ensures long-lasting performance and compatibility with your existing equipment.

Compatibility

This defrost board is compatible with a wide range of Nordyne, Nortek, Intertherm, Miller, Frigidaire, Maytag, and related brand residential split-system heat pumps (including many N-Series, T5BD, MT5BD, MT5QD, CSH4BD series models). Always verify your specific model and serial number against the equipment service literature or consult an HVAC professional before installation.

This reliable OEM part is the ideal solution for restoring your heat pump’s performance quickly and affordably. Order with confidence knowing you’re getting a factory-authorized component backed by Nordyne quality.