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This is the genuine OEM start capacitor (part number P281-1766) factory-specified for the Carrier PH15NB01800GBAAA heat pump. The start capacitor delivers a high-energy electrical pulse to the compressor motor at the moment of startup, overcoming inertia and bringing the compressor up to operating speed within milliseconds. When this capacitor fails or weakens, the compressor may struggle to start, draw excessive amperage, trip the breaker, or fail to run entirely — often presenting as a system that hums but produces no cooling or heating output.
Compatibility: Engineered for the Carrier PH15NB01800GBAAA heat pump. Always verify the MFD range and voltage rating on your existing capacitor's label or unit data plate before ordering to confirm fitment. Need help? Our HVAC parts specialists verify compatibility before your order ships.