OEM Carrier Dual Run Capacitor 40+5 MFD 440V for Model PY1PJB048115NBAA

This OEM capacitor kit contains the factory-specified replacement capacitors for the Carrier PY1PJB048115NBAA packaged heat pump unit. The kit includes three Carrier/Totaline capacitors: the primary P291-4054 dual run capacitor (40+5 MFD 440V, round) which powers both the compressor and condenser fan motor simultaneously, plus two single run capacitors — P291-0403 (4 MFD 370V) and P291-1503 (15 MFD 370V) — for auxiliary motor circuits. When any of these capacitors fail, you may experience a hard-starting or non-starting compressor, a condenser fan that hums but won't spin, warm air from the supply registers, or the unit short-cycling within the first few minutes of operation.

• Specs — P291-4054 (Primary Dual Run): 40+5 MFD | 370/440V rated | Round case | ±3% factory tolerance | Replaces HC98KA040, HC93CZ035, HC98CA040
• Specs — P291-0403 (Single Run): 4 MFD | 370V rated | Oval case | Genuine Carrier/Totaline OEM
• Specs — P291-1503 (Single Run): 15 MFD | 370V rated | Oval case | Genuine Carrier/Totaline OEM
• OEM vs Generic: OEM Carrier/Totaline capacitors are factory-matched to ±3% MFD tolerance. Generic aftermarket capacitors commonly run ±6–10%, which places added electrical stress on the compressor and fan motor windings, shortening their service life — especially critical in packaged rooftop and heat pump applications like the PY1PJB048115NBAA.
• Install difficulty: 2/5 — Shut off the disconnect and wait at least 5 minutes for capacitors to self-discharge. Discharge manually with an insulated resistor before touching terminals. Tools needed: 1/4" nut driver, needle-nose pliers, multimeter set to capacitance. Photograph all wiring connections before disconnecting. Dual run capacitor terminals are labeled HERM (compressor), FAN, and C (common).
• Warranty: 1-year OEM manufacturer warranty on all three capacitors. Orders placed before our daily cutoff ship same business day from our warehouse.

Compatibility: Designed for the Carrier PY1PJB048115NBAA packaged heat pump unit (4-ton, 115,000 BTU). Always verify MFD, voltage rating, and terminal count against your unit's data plate and existing capacitor before installing. Our fitment team is available to confirm compatibility before you order — no guesswork required.