York S1-031-03498-001 Control Board 328140-751 it features a modular design

it features a modular design with two independent check valves and two shutoff valves

boiler system feedwater control

providing the reliability required for critical cooling cycles

this component ensures stable point-to-point wiring for HVAC system diagnostics and power distribution

Designed for use within Hankison 1303 filtration housings

York S1-031-03498-001 Control Board 328140-751 it features a modular designThe 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