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The Goodman B1226207 is a genuine OEM suction-line accumulator for the WPH4448AHAA packaged heat pump and compatible Goodman/Amana units. Installed on the compressor suction line, the accumulator traps liquid refrigerant during defrost and low-load conditions, metering it back as vapor to protect the compressor from damaging liquid slugging. A corroded or internally failed accumulator can restrict flow or allow floodback, leading to compressor failure.
The OEM accumulator is sized to the system's charge and tonnage with correctly positioned inlet/outlet and oil-return orifice. An undersized or mismatched generic can cause oil-return problems or floodback. For a sealed-system component this critical, OEM is the recommended choice.
Advanced (Pro required). Requires EPA-certified refrigerant recovery, brazing, evacuation, and recharge. This is not a DIY part — schedule a licensed HVAC technician; typical job 1.5–2.5 hours.