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Bard part 8552-008 is an OEM dual run capacitor rated 20/15 MFD at 440V, used to provide the correct phase shift and stored energy needed for reliable starting and smooth operation of the compressor and fan motor in Bard wall mounted HVAC equipment. A weak or out of tolerance capacitor can cause hard starting, overheating, nuisance trips, or poor cooling performance, so replacing with the exact microfarad ratings and voltage is critical for proper motor operation and long term reliability. Verify the MFD ratings on your existing capacitor and match the wiring terminals before installation to ensure correct fit and safe operation.