OEM Carrier Dual Run Capacitor 45+5 MFD 370V for Model PH10JA03600GAEAA

This OEM dual run capacitor (part number P291-4553RS, superseded by P291-4554RS) is the factory-specified replacement for the Carrier PH10JA03600GAEAA heat pump system. The dual run capacitor stores and delivers the electrical charge required to start and sustain both the compressor and the condenser fan motor simultaneously. When this capacitor degrades or fails, common symptoms include a loud humming with no motor start, the outdoor unit not turning on at all, intermittent short-cycling, or the condenser fan spinning slowly and struggling to reach full speed. Left unaddressed, a weak capacitor will accelerate wear on the compressor — often the most expensive component on the system.

• Specs: 45+5 MFD (microfarad) | 370V rated | Round case | 50/60 Hz | AFC 10,000 | ±6% tolerance | Castor oil protected | No PCBs | UL recognized
• OEM vs Generic: OEM Carrier capacitors are manufactured to exact factory tolerance (±6% MFD). Generic aftermarket units commonly run ±10% or worse, which increases inrush current stress on the compressor windings and shortens motor life — false economy on a costly system.
• Install Difficulty: 2/5 — Always disconnect power at the breaker and discharge the capacitor before touching terminals. Tools needed: 1/4" nut driver, insulated needle-nose pliers, multimeter (capacitance mode). Photograph all wiring connections before disconnecting the old unit. Swap terminals one at a time to avoid miswiring.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH10JA03600GAEAA heat pump. Note: P291-4553RS has been officially superseded by P291-4554RS — both share identical electrical specifications and are a direct fit. Always verify the MFD rating and voltage on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy.