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The B1225022S is a genuine Goodman OEM 24-volt solenoid coil that drives the reversing (4-way) valve on the ASH130481AC 13 SEER, 4-ton heat pump. When energized, this coil shifts the valve to switch the system between heating and cooling. A burned-out or open coil is one of the most common reasons a heat pump gets stuck in one mode — blowing cold air in winter or failing to defrost. Replacing the coil is far cheaper than swapping the entire reversing valve.
The genuine Goodman coil matches the valve stem diameter, coil resistance, and terminal orientation exactly, ensuring solid valve actuation. Generic coils may fit loosely or draw the wrong current, leading to weak shifting and repeat failures. OEM is the reliable fix for changeover problems.
Rated Easy (2/5). Power down the unit, unclip the retaining nut, slide the old coil off the valve stem, install the new coil, and reconnect the two low-voltage leads. No refrigerant recovery required — the coil replaces without opening the sealed system.