York S1-031-02995-000 Control Board

The York S1-031-02995-000 Control Board is a genuine OEM replacement engineered for York gas/electric HVAC units, specifically those utilizing the Simplicity Lite control platform. As a veteran-grade two-stage control board, it serves as the central logic hub, managing 2-stage heating and cooling sequences, blower motor timing, and gas valve sequencing. This board is critical for maintaining integrated diagnostics and safety monitoring, effectively replacing part numbers S1-03102995000 and 663679. It features factory-calibrated microprocessor technology to ensure precise thermostat input response and system sequencing. For field technicians, this direct-fit replacement simplifies HVAC control board troubleshooting by providing clear diagnostic LED indicators to identify pressure switch stuck open, limit switch lockout, or flame sensor signal issues. Built for industrial-grade durability, it orients the ignition control and fan relay functions to restore peak operating efficiency in residential and commercial HVAC systems.

• OEM Compatibility: Exact replacement for York Simplicity Lite systems, ensuring correct pin-out and mounting.
• Multi-Stage Control: Supports 2-stage heating and 2-stage cooling for precise load matching and energy efficiency.
• Advanced Diagnostics: Integrated LED flash codes allow for rapid fault retrieval of the last 5 stored errors.
• Rugged Reliability: Designed to withstand the thermal stress of gas/electric unit blower compartments.
• Blower Management: Governs blower motor delays and inducer fan relay logic for safe heat exchanger cooling.

Common Questions

How do I retrieve fault codes from this board?
With no active thermostat call, press and release the "Last Error" button on the control board. The diagnostic LED will flash the most recent stored codes to assist in troubleshooting.

Is this a direct replacement for the 663679?
Yes, the York S1-031-02995-000 is the direct OEM replacement for part number 663679 and is fully compatible with gas/electric configurations.

What does a steady red light on the LED indicate?
A steady red light typically indicates a self-test failure or a faulty circuit board logic, requiring a full system reset or board replacement.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.