York 331-02977-000 Control Board Kit Freon Always verify the individual motor

Always verify the individual motor requirements on the unit’s data plate before installation

the unit must be calibrated in its final mounting orientation

2W DIN Coil is specifically designed for solenoid valve maintenance in high-demand environments

Can the A421GBF-02 control both heating and cooling

York 331-02977-000 Control Board Kit Freon Always verify the individual motorThe York S1 331 02977 000 2 Stage ECM Control Board Kit is an essential OEM replacement engineered for precise furnace sequence control and ECM blower motor modulation. Designed for two stage gas furnaces, this integrated furnace control (IFC) manages induction motor timing, ignition sequences, and multi speed airflow adjustments to ensure optimal thermal efficiency. It serves as the direct HVAC replacement board for several legacy models, including