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Bard 5650-038BX is an OEM heat pump reversing valve assembly with a 24V solenoid coil, used to shift refrigerant flow so the unit can switch between heating and cooling modes. This valve is specified for select Bard wall mounted packaged heat pump models and is commonly listed with 3/4 x 1/2 inch nominal connections, making correct part number matching critical for proper piping fit and reliable changeover operation. If your system is stuck in one mode, intermittently changes over, or has a failed valve coil, replacing with the correct Bard factory part helps restore normal heat pump performance and serviceability.
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.