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Bard part number 5651-244BX is an OEM electronic expansion valve (E2V18, boxed) used to precisely meter refrigerant flow to the evaporator for stable superheat control and reliable cooling performance on compatible Bard wall mount and packaged systems. When an EEV sticks, leaks, or loses control, it can cause poor capacity, erratic suction conditions, and nuisance faults, so replacing it with the correct Bard valve helps restore factory operation and protects the compressor. Confirm fit by matching the full part number to your unit model and serial, and plan on proper refrigerant recovery and recharge procedures when installing this metering device.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.