The York 031-01095-002 is a microprocessor-based control board—also referenced as BRD‑4901/BRD‑4904—designed for use in York chillers and HVAC systems. This board serves as the main processing unit for chiller control, managing operations such as compressor staging, fan control, system diagnostics, and safety interlocks. It does not include an EEPROM, so firmware or configuration data must be separately installed.

Key Features

Model: 031‑01095‑002 (also listed as 031‑01095‑001, BRD‑4901)
Board Type: Chiller microprocessor control PCB, without EEPROM
Functionality: Core chiller control—compressor, fans, safety logic—via onboard MCU
Mounting: Internal chassis installation as OEM replacement/replacement part
Condition Variants: Available as new OEM, surplus, or refurbished units (e.g., “Rev B” on eBay)
Physical Dimensions: Approx. 298 × 381 × 108 mm, 0.3 kg
Applications: Suitable for York HVAC or chiller systems that originally used the 031‑01095‑002 board

York – 031-01095-002 – Microprocessor Circuit Board for Chillers