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This is the genuine OEM replacement start capacitor (part number P281-1766) factory-specified for the Carrier PH14NA042000BAAA heat pump. The start capacitor delivers a high-voltage boost to the compressor motor at startup, enabling it to overcome inertia and reach operating speed. Without a functioning start capacitor, the compressor will hum, trip on thermal overload, or fail to start entirely — leaving your system with no cooling or heating. If your Carrier unit attempts to start but shuts back down within seconds, or you hear a clicking or humming noise from the condenser cabinet, a failed start capacitor is one of the most common culprits.
Compatibility: Designed for the Carrier PH14NA042000BAAA heat pump condenser. Always verify the MFD range and voltage rating on your unit's data plate before ordering. Note: Carrier sources capacitors from third-party manufacturers — the label on the capacitor body may reflect the manufacturer's name rather than Carrier. This is normal and does not affect fitment or performance. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you order.