OEM Carrier Single Run Capacitor 15 MFD 370V — P291-1503 for Model PH3PPA036000AA

This OEM Carrier single run capacitor (part # P291-1503) is the factory-specified replacement for the Carrier PH3PPA036000AA packaged heat pump unit. The run capacitor provides the continuous phase-shifted electrical charge that keeps the compressor or fan motor spinning after startup. When this capacitor weakens or fails, you'll notice symptoms such as a loud humming with no motor movement, the system short-cycling off within minutes of startup, or a complete failure to start — even though the thermostat is calling for cooling or heating.

• Specs: 15 MFD (microfarad) | 370V rated | Oval case | 50/60 Hz | Non-PCB dielectric fluid | UL-approved current interrupter | Multiple electrical terminals
• OEM vs Generic: This is a genuine Carrier Totaline OEM capacitor manufactured to exact factory tolerances (±5% MFD). Generic aftermarket capacitors often run ±10% or wider, accelerating motor winding wear and reducing compressor life — a false economy on a critical component.
• Install difficulty: 1/5 — One of the easiest HVAC repairs. Tools needed: flathead or nut driver, needle-nose pliers, multimeter (to confirm discharge). Always discharge the capacitor fully before touching terminals and photograph all wire connections before removal.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse — order by 3 PM local time for same-day dispatch.

Compatibility note: Designed for the Carrier PH3PPA036000AA packaged heat pump. Note that P291-1503 (370V) has been superseded by P291-1504 (440V) as the current OEM replacement — both share the same 15 MFD rating and are functionally interchangeable. Always verify the MFD rating and voltage on your unit's data plate before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today.