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The B1226206 is the OEM suction-line accumulator for the Goodman ANZ130181AC heat pump. Positioned on the compressor suction side, it traps liquid refrigerant and oil that would otherwise slug the compressor, metering it back as vapor at a safe rate. This is critical in heat-pump service, where reversing-valve operation and cold-weather starts regularly send liquid toward the compressor. A cracked or restricted accumulator can flood the compressor and lead to catastrophic mechanical failure.
This genuine OEM accumulator is sized to the ANZ130181AC's refrigerant charge and line diameters, so internal volume and fitting geometry match the system exactly. An undersized or mismatched generic can restrict flow or fail to protect the compressor. Given the cost of a compressor, OEM is strongly recommended.
This is a sealed-system repair. A licensed EPA-608 technician must recover the refrigerant, cut/braze the new accumulator into the suction line, pull a vacuum, and recharge the system. Not a DIY part. Estimated time: 1-2 hours for a qualified tech.