OEM Carrier Dual Run Capacitor 45+5 MFD 370V for Model PH10JA03600GAJAA

This OEM dual run capacitor (part# P291-4553RS) is the factory-specified replacement for the Carrier PH10JA03600GAJAA heat pump condenser. The dual run capacitor stores and releases the electrical charge needed to start and sustain both the compressor and the condenser fan motor simultaneously. When it fails, you'll typically notice a loud hum with no motor movement, intermittent short-cycling, warm air from the system, or a condenser fan that spins only when manually nudged. Left unaddressed, a weak or failed capacitor accelerates compressor wear and can lead to costly motor burnout.

• Specs: 45+5 MFD (microfarad) | 370V rated | Round case | ±6% tolerance | 50/60 Hz | AFC: 10,000 | Non-PCB castor oil dielectric fluid | UL approved current interrupter
• OEM vs Generic: This is a genuine OEM-grade replacement built to Carrier factory tolerances. Generic capacitors commonly ship at ±10% MFD variance, placing unnecessary strain on compressor windings and shortening fan motor life — particularly in high-ambient heat pump applications.
• Install difficulty: 2/5 — Always discharge the old capacitor with an insulated screwdriver before touching terminals. Tools needed: 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting. Match terminal labels (HERM, FAN, COM) exactly on reinstall.
• Warranty: 1-year OEM replacement warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH10JA03600GAJAA heat pump condenser unit. Always verify the MFD rating and voltage printed on your unit's data plate before ordering — using an incorrect capacitor rating will void your warranty and may damage connected motors. Have a question about fitment? Our HVAC parts specialists verify compatibility before you order — contact us before purchasing.