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The Goodman B1225022S is a genuine 24-volt solenoid coil that energizes the reversing (4-way) valve on the ASH130301A heat pump. The coil is what tells your system to switch between heating and cooling modes. When it fails, the heat pump commonly gets stuck in one mode — blowing cold air in winter or failing to cool in summer — even though the compressor runs normally.
This OEM coil slides onto the reversing valve stem and secures with the factory retaining clip, delivering the correct magnetic pull and coil resistance to shift the valve reliably every cycle.
Genuine Goodman coils are matched to the valve's stem diameter and pull force, ensuring a full, positive shift of the slide inside the valve. Undersized generic coils may buzz, overheat, or fail to fully shift, leaving the system in a partial-mode fault. The OEM B1225022S guarantees correct fit and dependable switching.
Easy — The coil replaces without opening the refrigerant circuit. Cut power, remove the retaining clip, slide off the old coil, slide on the new one, reconnect the two 24V leads, and replace the clip. No brazing or evacuation required. Most homeowners can complete this in about 15 minutes.