York S1-373-23867-001 Defrost Module

The York S1-373-23867-001 Yorkguard 1 Stage Defrost Module is a critical OEM replacement component designed for 1-stage heat pump systems to prevent ice accumulation on the outdoor coil. Featuring the Yorkguard demand defrost logic, this module monitors thermodynamic conditions to initiate a defrost cycle only when necessary, rather than on a set timer, maximizing HVAC energy efficiency. As a veteran technician knows, maintaining the integrity of the heat pump defrost control board is essential for preventing compressor slugging and ensuring consistent heating performance in sub-freezing temperatures. This S1-373-23867-001 control board integrates seamlessly with existing liquid line and ambient sensors, managing the reversing valve and outdoor fan motor transitions. By using genuine York replacement parts, you ensure full compatibility with York, Luxaire, and Coleman equipment, maintaining the original factory specifications for defrost cycle termination and system protection.

• Demand Defrost Logic: Reduces unnecessary cycles, saving wear on the compressor and reversing valve.
• Direct OEM Fit: Drop-in replacement for S1-373-23867-001 ensures terminal-to-terminal wiring accuracy without field modifications.
• Optimized Performance: Precise monitoring of coil temperatures prevents efficiency-robbing frost buildup in extreme conditions.
• System Protection: Includes logic to manage the outdoor fan and auxiliary heat during the defrost transition to prevent cold-blow.

• How do I test this module in the field? You can jump the "TEST" pins to force a speed-up cycle, allowing you to verify that the reversing valve shifts and the outdoor fan de-energizes as intended.
• What causes a York defrost board to fail? Typical culprits include voltage surges, failed ambient or liquid line sensors providing incorrect resistance values, or moisture intrusion into the control box.
• Is this compatible with 2-stage systems? No, this specific part number is engineered strictly for 1-stage Yorkguard applications. Always verify the model nomenclature before installation.

This item is not eligible for free shipping.

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.