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This OEM dual run capacitor (P291-3553RS, superseded by P291-3554RS) is the factory-specified replacement for the Carrier PH13NR018000AEAA split-system heat pump condenser. The dual run capacitor serves two motors simultaneously — it stores and delivers the electrical charge needed to start and sustain both the compressor and the condenser fan motor. When this component fails, you'll typically hear a low hum with no motor movement, experience intermittent short-cycling, or find the outdoor unit completely unresponsive. A failed capacitor is one of the most common causes of no-cool and no-heat calls on residential heat pump systems. A companion start capacitor (P281-8806) is also available for this model — consider replacing both during the same service visit to restore full system reliability.
Compatibility: Designed for Carrier model PH13NR018000AEAA heat pump condensers. Also crosses to part numbers P291-3554RS (OEM successor), HC98JA036D, HC98CA036, HC98CA035, HV98CA035, 97F9834, 05706032, and 43-25133-35. Verify MFD rating and voltage on your unit's data plate before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — ships today when ordered before 3 PM.