OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY2PEB042090AB

This is the factory-specified OEM single run capacitor for the Carrier PY2PEB042090AB packaged gas/electric unit. Run capacitors remain in the circuit continuously while the motor operates, supplying the phase-shifted current that keeps the condenser fan motor spinning efficiently. When this capacitor weakens or fails, you'll notice classic symptoms: a humming condenser fan that won't spin up, warm air from the supply registers, or the unit short-cycling and tripping on thermal overload. Replacing this small but critical component is one of the most common — and most cost-effective — HVAC service calls.

• Specs: 4 MFD (microfarad) | 370 VAC | Oval case | Single run | 50/60 Hz | Factory-matched ±5% tolerance — OEM part number P291-0403
• OEM vs Generic: This OEM Carrier/Totaline capacitor is manufactured to exact factory tolerances and tested to 60,000 service hours. Generic capacitors often carry ±10% MFD tolerance, accelerating motor wear and shortening equipment life.
• Install difficulty: 2/5 — Disconnect power at the breaker and allow the capacitor to discharge fully before touching terminals. Tools needed: 1/4" nut driver, insulated needle-nose pliers, multimeter. Always photograph existing wiring before disconnecting terminals to ensure correct reinstallation.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY2PEB042090AB packaged gas/electric unit. This listing covers the condenser fan motor run capacitor (P291-0403, 4 MFD 370V). A companion single run capacitor P291-1503 (15 MFD 370V) is also available for the compressor circuit on this model — see our related listings. Always verify the MFD and voltage ratings on your existing capacitor's label before ordering. Have a fitment question? Our HVAC parts specialists confirm compatibility before you buy — reach out via chat or phone. Order today and we'll ship it out the same business day.