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Bard part 8552-035 is an OEM 40 MFD, 370V round motor run capacitor with a 1-3/4 inch diameter that helps provide the correct phase shift and stable operating torque for Bard wall mounted HVAC equipment. A weak or failed run capacitor can cause hard starting, overheating, nuisance trips, or a motor that hums but will not run, so replacing it with the correct Bard-specified capacitance and voltage rating is critical for reliable compressor or fan operation. Confirm your existing capacitor matches 40 microfarads at 370 volts and the same physical form factor before ordering to ensure proper fit and safe performance.