OEM Carrier Dual Run & Start Capacitor Kit 45+7.5 MFD 370V for Model PH13NR030000AAAA

This factory-matched capacitor kit is the OEM-specified replacement for the Carrier PH13NR030000AAAA heat pump condenser. It includes both the dual run capacitor (P291-4573RS) — which powers both the compressor and condenser fan motor simultaneously — and the start capacitor (P281-8806), which delivers the extra electrical torque needed to kick the compressor into motion on each cooling or heating cycle. When either capacitor fails, you'll typically hear a loud hum with no motor movement, experience a hard shutdown within seconds of startup, or notice the outdoor unit running but not cooling or heating effectively.

• Specs — Dual Run Capacitor (P291-4573RS): 45+7.5 MFD (microfarad) | 370V rated | Round case | Dual-section (compressor + fan) | OEM tolerance ±3% | Superseded by P291-4574RS
• Specs — Start Capacitor (P281-8806): OEM Carrier start capacitor | Factory-matched for PH13NR030000AAAA compressor | Provides high-torque startup boost
• OEM vs Generic: OEM capacitors are manufactured to Carrier's exact factory tolerance specifications. Generic aftermarket units frequently ship with ±10% MFD variance, which accelerates compressor and fan motor wear and can void equipment warranties.
• Install Difficulty: 2/5 — Always discharge the capacitor fully before touching terminals (use an insulated resistor or discharge tool). Tools needed: 1/4" nut driver, needle-nose pliers, multimeter set to capacitance mode. Photograph all wiring connections before disconnecting. Turn off power at both the disconnect box and the thermostat before beginning.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed specifically for the Carrier PH13NR030000AAAA heat pump condenser. Always verify the MFD rating and voltage on your unit's data plate before ordering. Note: P291-4573RS has been superseded by P291-4574RS — both are covered. Not sure it fits? Contact our team for free fitment verification before you order — we confirm compatibility on every HVAC part.