OEM Carrier Dual Run Capacitor 45+5 MFD 440V for Model PY4GNAB36090NA

This is the genuine OEM factory-specified dual run capacitor (part number P291-4554RS) for the Carrier PY4GNAB36090NA packaged unit. The dual run capacitor simultaneously powers both the compressor (HERM) and the condenser fan motor (FAN) from a single round can. When this capacitor weakens or fails, you'll typically experience symptoms such as a loud humming noise with no motor start, the system tripping on thermal overload shortly after startup, or the condenser fan spinning slowly or not at all — all signs of a capacitor that can no longer hold its rated charge.

• Specs: 45+5 MFD (microfarad) | 440V rated | Round case | ±6% tolerance | 50/60 Hz | AFC 10,000 | Castor oil protected | No-PCB construction | Height: 3-15/16" (4-1/2" with terminals) | Diameter: 2-7/16"
• OEM vs Generic: This is a genuine Carrier OEM part meeting exact factory tolerances. Generic aftermarket capacitors commonly run ±10% MFD variance, which accelerates compressor and fan motor wear and can void equipment warranties. Note: Carrier sources capacitors from partner manufacturers — the label on the capacitor will reflect the component manufacturer's name, not Carrier's.
• Install difficulty: 2/5 — Always discharge the capacitor fully before touching terminals. Tools needed: 1/4" nut driver, needle-nose pliers, multimeter (to verify capacitance before and after). Photograph all wiring connections before disconnecting. Match HERM, FAN, and COMMON terminals exactly to original wiring.
• Warranty: 1-year OEM manufacturer warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY4GNAB36090NA packaged unit. Also replaces legacy Carrier part numbers HC98KA046 and 319186-702. Verify MFD rating, voltage, and terminal configuration against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — don't guess on a capacitor replacement.