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This is the genuine OEM start capacitor (part number P281-1766) factory-specified for the Carrier PH15NA030000BAAA heat pump system. The start capacitor delivers the high-voltage electrical boost needed to kick the compressor motor into operation at startup. Without a functioning start capacitor, the compressor cannot overcome initial inertia — resulting in a humming unit that trips on overload, a system that short-cycles immediately after startup, or a compressor that fails to start altogether. If your Carrier heat pump is running but the compressor never engages, or you hear a clicking or humming sound at startup followed by shutdown, this capacitor is the most common culprit and one of the most cost-effective fixes available.
Compatibility: Designed as the direct OEM replacement for the Carrier PH15NA030000BAAA heat pump. Always verify the MFD range and voltage rating on your unit's data plate before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you purchase — no guesswork required.