OEM Carrier Single Run Capacitor Kit 4 MFD + 15 MFD 370V for Model PY1REA048074AAWB

This OEM-matched single run capacitor kit contains both factory-specified capacitors for the Carrier PY1REA048074AAWB 4-ton single-package rooftop gas/electric unit. Part number P291-0403 (4 MFD 370V) serves the condenser fan motor circuit, while P291-1503 (15 MFD 370V) supports the compressor run circuit. Unlike a dual run capacitor, these packaged rooftop units use two discrete oval single run capacitors — one per motor. When either capacitor weakens or fails, you'll see symptoms like a condenser fan that hums but won't spin, a compressor that short-cycles, or a unit that trips on thermal overload within minutes of startup.

• Specs — P291-0403: 4 MFD (microfarad) | 370 VAC | Oval case | ±6% tolerance | 50/60 Hz | Replaces HC90AA004, HC91CA004, 97F5704
• Specs — P291-1503: 15 MFD (microfarad) | 370 VAC | Oval case | ±6% tolerance | 50/60 Hz | Replaces HC90AA015, HC91CA015, HC90AB015
• OEM vs Generic: Carrier sources these capacitors from Totaline/Genteq — the OEM-branded versions carry tighter tolerances and are tested to 60,000 service hours. Generic capacitors may run ±10% MFD, accelerating motor wear on your packaged unit's compressor and fan motor over time.
• Install difficulty: 2/5 — Disconnect and lock out power at the rooftop disconnect before accessing the electrical compartment. Always discharge capacitors with a resistor before touching terminals. Tools needed: 1/4" nut driver, needle-nose pliers, multimeter with capacitance function. Photograph all wiring before disconnecting terminals.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY1REA048074AAWB 4-ton packaged rooftop gas/electric unit. Verify both MFD ratings and the 370V voltage rating on your unit's data plate before ordering — do not substitute a higher MFD rating on the fan motor circuit. Questions about fitment? Our HVAC parts specialists verify compatibility before you order. In stock and ready to ship today.