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This genuine OEM start capacitor (part number P281-1766) is the factory-specified replacement for the Carrier PH4ANG042000BAAA heat pump. The start capacitor delivers the high-voltage burst of energy needed to kick-start the compressor during each cooling or heating cycle. When the start capacitor fails, the compressor struggles to turn over — you may hear a clicking or humming noise with no cooling output, or the system may trip the breaker after a failed start attempt.
Compatibility: Direct OEM replacement for Carrier PH4ANG042000BAAA heat pump systems. 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 — just ask!