Pay in 4 interest-free payments of $131.09 Learn more
Ships within 48 hours · Estimated delivery Sep 5 - Sep 10
Even-hour modules like the A877-20 are timed to initiate on even hours of the dial
Standard conversion kits focus on the motor and blower assembly
Does this controller support fan-only or emergency heat modes
including diverting supply lines or feeding and exhausting branch lines based on signal pressure
York S1-331-02972-000 Control Board Refrigerant Even-hour modules like the A877-20The York S1 331 02972 000 Control Board is a genuine OEM replacement engineered specifically for high efficiency 97% modulating furnaces. As a veteran grade modulating furnace control board, this 2nd generation kit represents the central processing logic required to manage complex combustion cycles and airflow residential profiles. This board is the primary driver for coordinating variable speed blower motor signatures and gas valve modulation,