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Bard part number 5650-042BX is an OEM 24V solenoid valve coil used on Bard HVAC equipment to energize the solenoid valve so the system can open and close refrigerant flow when commanded by the controls. A weak or open coil can cause a valve to stay closed or fail to shift, leading to cooling issues or nuisance service calls, so replacing it with the correct Bard coil helps restore proper valve operation and reliable cycling. This boxed replacement is intended to match Bard specifications for fit and electrical performance, and it is commonly listed as replacing Bard 5650-042, so confirm your model and the valve coil voltage before ordering.
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.