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This OEM single run capacitor is the factory-authorized replacement for the Carrier PH1PNA060000AABA packaged heat pump unit, sold under OEM part number P291-1503 (now superseded by P291-1504). The run capacitor maintains a continuous phase-shifted current to keep the compressor or condenser fan motor running at peak efficiency after startup. When the capacitor degrades or fails, you'll typically notice the motor humming without starting, the unit short-cycling, reduced cooling or heating output, or a tripped high-pressure cutout — all classic signs of a weak or open capacitor.
Compatibility: Fits Carrier model PH1PNA060000AABA packaged heat pump unit. OEM part P291-1503 has been superseded by P291-1504 (15 MFD, 440V oval) — both part numbers are fulfilled by the same current production unit. Verify the MFD rating and voltage on your unit's data plate before ordering to ensure a correct match. Have questions about fitment? Our HVAC parts specialists verify compatibility before you order — contact us anytime.