York S1-331-01975-001 Control Kit

Managing frost accumulation on heat pump evaporator coils requires a reliable, logic-driven solution rather than basic timed cycles. The York S1-331-01975-001 Demand Defrost Control Kit is a field-proven OEM replacement board engineered to upgrade older, less efficient 031-01098 series controls. For contractors servicing York, Coleman, or Luxaire equipment, this heat pump defrost control utilizes a shunt jumper system to select precise defrost "curves," ensuring compatibility with both reciprocating and scroll compressors. By monitoring the ambient temperature sensor and coil conditions, the York demand defrost board initiates cycles only when necessary, preventing unit wear and reducing energy consumption. This kit is the direct HVAC replacement part for legacy numbers including 031-01098-001, S1-031-01098-701, and 031-01098-713. For a successful defrost control board installation, always verify 24VAC power at the "C" and "Y" terminals before troubleshooting and ensure the jumper is seated correctly to prevent soft lockouts or compressor delays.

• Universal Compatibility: Serves as a direct upgrade for the 031-01098-011, -013, and -015 series, covering a broad range of 14 SEER heat pump models.
• Selectable Defrost Curves: Features adjustable jumper pins to fine-tune defrost logic based on specific compressor types, maximizing HVAC system efficiency.
• Comprehensive Tech Kit: Includes the control board, wiring harnesses, and necessary sensors to ensure a complete and reliable field repair.
• Advanced Diagnostics: Equipped with onboard LED indicators and a "Last Error" button to speed up heat pump troubleshooting and fault code retrieval.
• Optimized Performance: Enhances system longevity by preventing the unnecessary mechanical stress of timed defrost cycles in dry or mild conditions.

Does this board replace the old 031-01098-001 control?
Yes, the S1-331-01975-001 is the direct OEM successor. It is designed to replace all previous iterations of the 031-01098 control series and includes the updated wiring harnesses required for modern York HVAC parts standards.

How do I set the jumper for my specific compressor?
The board typically uses Position 1 for reciprocating compressors and Position 2 for scroll compressors. Refer to the included defrost control wiring diagram or technical sheet to match the "curve" to your unit's specific requirements. Remember to cycle 24V power after changing jumper positions for the settings to take effect.

What do I do if the unit is stuck in a lockout?
A soft lockout can often be reset by cycling the 24VAC thermostat call. However, for hard lockouts—often caused by repeated high-pressure switch trips or sensor failures—you must disconnect and reapply main power to the control board after verifying HVAC sensor accuracy.

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.