OEM Carrier Single Run Capacitor for Model PY2PNB042090AA (P291-0403 / P291-1503)

This is the factory-specified OEM single run capacitor for the Carrier PY2PNB042090AA packaged unit. A single run capacitor provides the continuous phase-shifted current needed to keep the compressor or fan motor running smoothly after startup. When it degrades or fails, you'll typically notice a humming compressor that won't turn over, intermittent short-cycling, or a complete no-start condition — all classic signs of capacitor failure in a packaged residential or light-commercial unit.

• Specs: Single run capacitor | Factory-matched MFD and voltage rating | Cylindrical case | ±5% OEM tolerance | Replaces OEM part numbers P291-0403 and P291-1503
• OEM vs Generic: This is a genuine OEM Carrier replacement, manufactured to exact factory MFD tolerance. Generic capacitors are often rated at ±10%, which increases thermal stress on motor windings and shortens compressor service life — a hidden cost that far exceeds any upfront savings.
• Install Difficulty: 2/5 — Always discharge the capacitor fully before handling any terminals. Tools needed: 1/4" nut driver, needle-nose pliers, and a multimeter to verify MFD output. Photograph all wiring connections before disconnecting the old unit.
• Warranty: 1-year OEM factory warranty included. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Engineered for the Carrier PY2PNB042090AA packaged unit. Always cross-reference the MFD and voltage ratings printed on your existing capacitor's label or the unit's data plate before ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility before you buy — no guesswork required.