CO2 System Ready: Fully compatible with R744 refrigerants

Durability: Features aluminized steel construction to resist oxidation and scale buildup during high-fire cycles

When should the S1-2805-4711 harness be replaced during a service call

90 Amp draw ensure it meets the original equipment manufacturer’s performance curves

this specialized York chiller oil is wax-free and additive-free

Williams P625471 Control Board 319848-301 CO2 System Ready: Fully compatibleThe Williams P625471 Control Board is a critical genuine OEM replacement part designed for precision furnace orchestration in high efficiency Williams heating systems. As a direct fit gas valve control module, this board manages the ignition sequence, flame sensing, and blower timing to ensure safe and consistent heat cycles. For technicians troubleshooting intermittent failures or lockout codes, installing this HVAC circuit board eliminates the