S1-031-03498-001 York DEMAND DEFROST CONTROL BOARD

The S1‑031‑03498‑001 York Demand Defrost Control Board is an OEM replacement designed for York, Coleman, and Luxaire heat pump systems equipped with demand‑defrost technology. Unlike traditional timed defrost boards, this control uses sensor‑driven logic to monitor outdoor coil conditions and initiate defrost only when necessary. This improves energy efficiency, reduces compressor wear, and prevents excessive frost accumulation in cold‑weather operation. Built on a durable PCB platform, it provides accurate sequencing of the compressor, reversing valve, and outdoor fan while ensuring long‑term reliability in residential heat pump applications.

The S1‑031‑03498‑001 is used in select York, Coleman, and Luxaire heat pump systems that utilize demand‑defrost logic. These systems rely on coil‑temperature and ambient‑temperature sensors to determine when defrost is required, reducing unnecessary cycles and improving overall system efficiency.

Compatible with:

• York heat pump models using demand‑defrost controls

• Coleman heat pump models using demand‑defrost controls

• Luxaire heat pump models using demand‑defrost controls

Common equivalent or superseded numbers associated with this board include:

• 031‑03498‑001

• S103103498001

• 03103498001

• OEM York/Coleman/Luxaire demand‑defrost equivalents

These boards are often grouped together for technician reference:

• S1‑031‑01971‑000 – timed/temperature defrost

• S1‑031‑01975‑000 – timed/temperature defrost

• S1‑031‑01976‑000 – timed/temperature defrost

• S1‑031‑03004‑000 – timed/temperature defrost

• S1‑031‑03498‑001 – demand‑defrost logic (this listing)