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Bard part number 8552-058 is an OEM dual run capacitor rated 80/10 MFD at 440V, used in Bard wall-mounted HVAC equipment to provide the correct phase shift and starting assist for the compressor and fan motor so the system starts smoothly and runs efficiently. If your unit has hard starting, a humming motor, nuisance trips, or weak airflow, a failed run capacitor is a common cause, and replacing it with the correct Bard-rated capacitor helps restore proper operation and protects motors from overheating. Always match both the microfarad ratings and the 440V rating to your unit nameplate and service documentation, and if you are seeing this part listed as obsolete, confirm whether the current Bard replacement for 8552-058 is required for your specific model and serial range.