OEM Carrier Dual Run Capacitor 55+7.5 MFD 370V for Model PH12NA042000ACAA

This OEM dual run capacitor (Carrier part# P291-5573RS, also sold with start capacitor P281-8806) is the factory-specified replacement for the Carrier PH12NA042000ACAA heat pump condenser. The dual run capacitor stores and delivers the electrical charge required to start and sustain both the compressor and the condenser fan motor simultaneously. When this capacitor weakens or fails, symptoms include a loud hum with no compressor startup, a condenser fan that won't spin, or the system short-cycling within the first few minutes of operation — leaving your home without cooling or heating.

• Specs: 55+7.5 MFD (microfarad) | 370V rated | Round case | ±6% factory tolerance | 50/60 Hz | UL approved current interrupter | No-PCB castor oil protected | AFC: 10,000 | Can height: 3¾" | Diameter: 2½"
• OEM vs Generic: This is an OEM Totaline/Carrier-sourced capacitor meeting exact factory tolerance of ±6%. Generic aftermarket capacitors commonly run ±10% MFD tolerance, which accelerates compressor wear, shortens motor life, and can void equipment warranties. Always match MFD and voltage exactly to your unit's data plate.
• Install difficulty: 2/5 — Always discharge the capacitor fully before touching any terminals (use an insulated resistor or discharge tool). Tools needed: ¼" nut driver, needle-nose pliers, multimeter set to capacitance mode. Photograph all wiring connections before disconnecting. Replace the start capacitor P281-8806 at the same time if your unit is equipped — both components age together.
• Warranty & Shipping: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse. Note: Carrier sources its capacitors from select OEM manufacturers — labeling on the capacitor body will reflect the manufacturer's name, not Carrier.

Compatibility: Direct OEM fit for Carrier model PH12NA042000ACAA heat pump condensing unit. Verify the 55+7.5 MFD and 370V rating against your unit's data plate before ordering — voltage must match or exceed the original rating. Frequently replaced alongside start capacitor P281-8806 (88–108 MFD, 330V). Questions about fitment? Our HVAC specialists verify compatibility before you order — same-day response guaranteed.