OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY1REA048115AAWB

This OEM Carrier/Totaline single run capacitor is the factory-specified replacement for the Carrier PY1REA048115AAWB packaged unit. The run capacitor remains in the circuit continuously while the fan motor operates, providing the phase-shifted current needed to keep the motor running efficiently. When this capacitor weakens or fails, you'll typically experience a fan motor that hums but won't spin, intermittent fan operation, or a unit that trips on high-pressure lockout due to insufficient airflow across the coil.

• Specs: 4 MFD (microfarad) | 370 VAC rated | Oval case | Part Numbers: P291-0403 (primary), P291-1503 (companion single run capacitor) | Replaces OEM P/N 97F5704, HC90AA004, HC91CA004, HC90AB004
• OEM vs Generic: This is a genuine Carrier/Totaline OEM capacitor manufactured to ±5% MFD tolerance and subjected to 100% electrical testing before packaging. Generic alternatives often carry ±10% tolerance, which accelerates motor winding stress and shortens component life.
• Install difficulty: 1/5 — One of the easiest HVAC repairs. Shut off power at the disconnect and allow 5 minutes for the capacitor to self-discharge before touching terminals. Tools needed: flathead screwdriver, needle-nose pliers, optional multimeter. Always photograph existing wiring before disconnecting terminals.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM drop-in replacement for Carrier model PY1REA048115AAWB. Always verify the MFD rating and voltage on your unit's data plate before ordering — never substitute a lower voltage-rated capacitor. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you order. Order today and get same-day shipping!