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The B1225022S is the genuine OEM 24-volt solenoid coil for the reversing valve on the Goodman ASH130301AD heat pump. This coil energizes the reversing (four-way) valve to switch the unit between heating and cooling modes. When the coil fails, the heat pump gets stuck in one mode — commonly "cooling only" with no heat, or vice-versa. Swapping the coil is a far cheaper fix than replacing the entire reversing valve.
The OEM B1225022S is wound to the exact resistance and inrush spec Goodman's board expects, and the bore matches the factory valve stem. Generic coils may have a loose fit or draw the wrong current, tripping the control board. For dependable mode switching, use the genuine coil.
No refrigerant work required — the coil slides off the valve stem after removing the retaining nut, then the new coil slides on and the two low-voltage leads reconnect. Disconnect power before servicing.