OEM Carrier Dual Run Capacitor 35+5 MFD 370V for Model PH12NA018000ACAA

This OEM Carrier capacitor kit — consisting of the P291-3553RS dual run capacitor and the P281-8806 start capacitor — is the factory-specified replacement for the Carrier PH12NA018000ACAA split-system air conditioner. The dual run capacitor stores and releases the electrical charge needed to start and sustain both the compressor and condenser fan motor simultaneously, while the start capacitor provides an extra torque boost during compressor startup. Common failure symptoms include an audible hum with no motor movement, the system short-cycling within minutes of startup, or the outdoor unit failing to start entirely while the indoor air handler continues to run.

• Specs (P291-3553RS Dual Run): 35+5 MFD (microfarad) | 370V rated | Round case style | HERM–C–FAN terminals | OEM GE/Genteq manufactured | Cross-references: HC98JA036D, HC98CA036, 97F9834
• Specs (P281-8806 Start Capacitor): OEM Carrier start capacitor | Factory-matched for PH12NA018000ACAA compressor | Provides high-torque boost on startup
• OEM vs Generic: OEM Carrier capacitors are manufactured by GE/Genteq to exact factory tolerances (±3% MFD). Aftermarket units often drift to ±10% MFD, increasing motor stress, shortening compressor life, and voiding equipment warranties.
• Install Difficulty: 2/5 — Always discharge the capacitor fully before touching any terminals (use a resistor or insulated screwdriver). Tools needed: 1/4" nut driver, needle-nose pliers, multimeter set to capacitance. Photograph all wiring connections before disconnecting the old unit.
• Warranty: 1-year OEM factory warranty. Orders placed before 3 PM ship same business day from our warehouse.

Compatibility: Engineered for the Carrier PH12NA018000ACAA split-system air conditioner. Note that P291-3553RS has been superseded by P291-3554RS — both part numbers are cross-compatible at 35+5 MFD 370V. Always verify MFD rating and voltage against your unit's data plate before ordering. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy.