OEM Carrier Dual Run & Start Capacitor Kit — P291-3553RS + P281-8806 for Model PH13NR018000AFAA

This factory-matched OEM capacitor kit contains both the dual run capacitor (P291-3553RS) and the start capacitor (P281-8806) specified for the Carrier PH13NR018000AFAA heat pump. The dual run capacitor continuously supports both the compressor and condenser fan motor during normal operation, while the start capacitor delivers an extra torque burst to help the compressor overcome startup inertia. When either fails, symptoms include a loud hum with no motor movement, a compressor that trips the breaker, short-cycling within the first few minutes, or a system that simply won't turn on at all. Replacing both at the same time eliminates callback risk — if one has failed, the other is likely near end-of-life.

• Specs — Dual Run (P291-3553RS): 35+5 MFD (microfarad) | 370 VAC | Round case | HERM–C–FAN terminals | Factory-matched ±3% tolerance
• Specs — Start Capacitor (P281-8806): 88–108 MFD | 330 VAC | Includes bleed resistor | Cycles compressor on startup
• OEM vs Generic: OEM Carrier capacitors are manufactured to exact factory tolerance. Generic units commonly run ±10% MFD deviation, which accelerates compressor winding stress and shortens motor life — especially critical on a heat pump running year-round.
• Install difficulty: 2/5 — Always discharge the capacitor before handling any terminals. Tools needed: 1/4" nut driver, needle-nose pliers, insulated screwdriver, multimeter. Photograph all wiring connections before disconnecting. Note: P291-3553RS has been superseded by P291-3554RS — this kit ships the current OEM-equivalent specification.
• Warranty: 1-year OEM factory warranty on both capacitors. Orders placed by 3 PM ship same business day from our warehouse.

Compatibility: Engineered for the Carrier PH13NR018000AFAA heat pump condensing unit. Verify MFD, voltage, and terminal configuration against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required.