S1-031-01976-000 York Defrost Control Board

The S1‑031‑01976‑000 York Defrost Control Board is an OEM replacement designed for York, Coleman, and Luxaire heat pump systems. This board manages the outdoor coil defrost cycle by monitoring temperature conditions, sequencing the compressor and fan, and initiating timed defrost operations to prevent ice accumulation during cold‑weather operation. Its rigid PCB construction provides stable performance, accurate timing, and long‑term reliability in residential HVAC applications. This is the correct replacement when a system experiences coil freeze‑ups, short‑cycling, or inconsistent defrost behavior.

These part numbers are commonly replaced by or associated with the S1‑031‑01976‑000:

• 031‑01976‑000

• S103101976000

• 03101976000

• OEM York/Coleman/Luxaire defrost control equivalents