York S1-031-03498-001 Control Board 320720-756 The hardware is rated for

The hardware is rated for a design working pressure of 450 psi for standard refrigerants

rotating the flange to the desired width to increase or decrease the effective diameter

providing the exact factory-specified response curves required for professional-grade temperature management

Technicians typically observe high superheat readings paired with low suction pressure

wire vibration causing an open circuit

York S1-031-03498-001 Control Board 320720-756 The hardware is rated forThe York S1 031 03498 001 Demand Defrost Control Board is a critical OEM replacement part engineered for high efficiency 14 SEER heat pump systems. As a veteran grade HVAC control board, it is the direct factory successor to the S1 031 03877 000, ensuring seamless integration with York TH4 series units, including models TH4B3622SA, TH4B4822SA, and TH4B6022SA. Unlike standard time temperature defrost boards, this demand defrost module utilizes advanced