York S1-031-03498-001 Control Board 320735-701 5" diameter band heater utilizes

5" diameter band heater utilizes a ceramic core (CC) design to ensure stable and uniform thermal distribution around the compressor housing

How does the NC PSH (Normally Closed Pushbutton) work

When diagnosing York furnace limit switch issues

this complete linkage kit provides the necessary mechanical advantage for reliable close-off in demanding HVACR environments

Broad Application: Suitable for HVACR

York S1-031-03498-001 Control Board 320735-701 5" diameter band heater utilizesThe 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