York Parts S1-33101975001 Heat Pump Defrost Control Board

Heat Pump Defrost Control Board from York Parts (S1-33101975001) is a crucial replacement that keeps your heat pump defrost cycles running smoothly. This Defrostdemand Kit replaces S1-03101975001, delivering reliable frost management and energy-efficient operation. Designed for residential and light commercial York systems, it ensures consistent defrost timing and dependable performance.

Engineered for compatibility with York heat pumps, this HVAC replacement part fits standard control board footprints and can be installed by a professional or a capable DIYer. The Defrostdemand Kit aligns with factory defrost cycles to minimize frost buildup, maintain steady airflow, and promote reliable performance during winter conditions. Replacing an aging defrost control helps reduce ice blockages and supports longer system life and consistent comfort.

• Defrost-demand operation for timely frost removal and reduced ice buildup
• Easy replacement with standard electrical connections
• Durable construction for long-term reliability in varying conditions
• Energy-efficient defrost cycles helping maintain comfort and lower operational costs
• Direct compatibility with York parts lineup and S1-03101975001 substitute

Trustworthy replacement part designed to preserve system efficiency, comfort, and long-term reliability of your heat pump.