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Bard 8552-043BX is a 45 MFD 370V motor run capacitor used in Bard wall mounted air conditioners and related HVAC equipment to provide the correct phase shift and stored energy needed for steady motor operation. A weak or failed run capacitor can lead to hard starting, overheating, nuisance trips, and poor overall performance, so replacing it with the exact Bard OEM-rated capacitor helps restore reliable operation and protects the motor and electrical system. Confirm the required microfarad rating and voltage on your unit data label or service literature, and match the physical style and mounting needs shown on the original capacitor before installation.
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.