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This genuine OEM start capacitor (part number P281-1766) is the factory-specified replacement for the Carrier PH3ANA030000BBAA heat pump system. The start capacitor delivers the high-torque electrical boost the compressor needs to overcome inertia and start under load. Without a healthy start capacitor, the compressor draws excessive amperage during start-up attempts, trips its thermal overload, and shuts down — leaving you with a system that hums briefly and then goes silent, or refuses to start altogether. If your Carrier unit is short-cycling, failing to cool, or tripping the breaker on startup, a failed start capacitor is one of the most common culprits.
Compatibility: Designed for the Carrier PH3ANA030000BBAA heat pump. Always cross-reference the MFD range and voltage on your existing capacitor's label or unit data plate before ordering. Our HVAC parts specialists are available to verify fitment — contact us before you order if you have any questions.