OEM Carrier Dual Run Capacitor 40+5 MFD 370V for Model PH1PNA036000AABA

This OEM dual run capacitor (part number P291-4053, superseded by P291-4054RS) is the factory-specified replacement for the Carrier PH1PNA036000AABA packaged heat pump unit. The dual run capacitor stores and releases the electrical charge needed to start and sustain both the compressor and condenser fan motor simultaneously. A failing capacitor is one of the most common causes of HVAC system failure — symptoms include an audible hum with no motor movement, a compressor that kicks on but immediately shuts off, or a condenser fan that spins slowly or not at all. Also included is the companion single run capacitor P291-1503 (15 MFD 370V oval), which independently supports the blower or auxiliary motor circuit on this unit.

• Primary Capacitor Specs (P291-4053 / P291-4054RS): 40+5 MFD (microfarad) | 370V rated | Oval case | ±6% tolerance | 50/60 Hz | 10,000 AFC | Castor oil protected dielectric
• Secondary Capacitor Specs (P291-1503): 15 MFD | 370V | Oval case | Single run | Non-PCB dielectric fluid | UL-approved current interrupter | Multiple electrical terminals
• OEM vs Generic: OEM Carrier capacitors are manufactured to exact factory tolerances (±6% MFD). Generic aftermarket units commonly run ±10% or worse, accelerating compressor and motor wear and shortening system lifespan. OEM is always the right choice for warranty-sensitive or commercial installations.
• Install Difficulty: 2/5 — Always discharge the capacitor fully before handling — stored charge can cause serious injury. Tools needed: 1/4" nut driver, insulated needle-nose pliers, multimeter (capacitance mode). Photograph all wiring connections before disconnecting. Note: P291-4053 is superseded by P291-4054RS (440V round); verify your unit's data plate before ordering.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH1PNA036000AABA packaged heat pump (3-ton, R-410A). OEM part numbers P291-4053 (dual run, 40+5 MFD 370V oval) and P291-1503 (single run, 15 MFD 370V oval). Always verify MFD rating and voltage on your unit's data plate before ordering. Our team is available to confirm fitment — call or chat before you buy.