OEM Carrier Dual Run & Start Capacitor Kit — P291-2553RS + P281-1896S for PH12NA018000AAAA

This factory-matched OEM capacitor kit includes both the dual run capacitor (P291-2553RS) and the start capacitor (P281-1896S) specified for the Carrier PH12NA018000AAAA heat pump. The dual run capacitor continuously powers both the compressor and condenser fan motor, while the start capacitor delivers the short-duration high-torque boost needed to get the compressor spinning under load. When either fails, symptoms range from a humming outdoor unit that won't start, to hard-start trips, nuisance breaker faults, or a compressor that runs briefly then shuts down on thermal overload. Replacing both together is the industry-standard practice — if one has failed, the other is under stress.

• Dual Run Capacitor Specs (P291-2553RS): 25+5 MFD (microfarad) | 370 VAC | Round case | ±3% OEM tolerance | Replaces HC98JA026, HC98CA026, HC98CA025, P291-2553R, GE 97F9803
• Start Capacitor Specs (P281-1896S): 189–227 MFD | 330 VAC | Round case | 50/60 Hz | Replaces 092A189B330CE7X, P2811896S — provides the hard-start current surge to protect compressor windings
• OEM vs Generic: Genuine Carrier OEM capacitors are manufactured to exact factory MFD tolerances (±3%), ensuring proper motor starting torque and run characteristics. Off-brand capacitors commonly ship at ±10% tolerance, accelerating compressor wear and voiding manufacturer warranty on newer units.
• Install Difficulty: 2/5 — Always discharge capacitors fully before handling (use a 20kΩ resistor or insulated discharge tool). Tools needed: 1/4" nut driver, needle-nose pliers, multimeter with capacitance mode. Photograph all wiring before disconnecting. Verify MFD and voltage ratings on the unit data plate before installing.
• Warranty: 1-year OEM factory warranty on both components. Orders ship same business day from our warehouse when placed before 3PM local time.

Compatibility: This kit is the factory-specified replacement for Carrier PH12NA018000AAAA 1.5-ton heat pump condensers. Both capacitors should be verified against your unit's data plate — confirm 25+5 MFD/370V for the dual run and 189–227 MFD/330V for the start capacitor before installation. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you order — contact us before purchasing if you have any questions.