OEM Carrier Dual Run Capacitor 50+7.5 MFD 370V for Model PH12NA036000AAAA

This OEM dual run capacitor is the factory-specified replacement for the Carrier PH12NA036000AAAA heat pump condenser, superseding original part number P291-5073RS with updated part number P291-5074R. The dual run capacitor stores and releases the electrical charge required to start and sustain both the compressor and condenser fan motor simultaneously. When this capacitor weakens or fails, you'll typically notice a persistent hum with no motor rotation, intermittent short-cycling, hard starts, or a complete failure of the outdoor unit to energize — all signs that immediate replacement is needed to prevent compressor damage.

• Specs: 50+7.5 MFD (microfarad) | 370V rated | Round case | Dual-section (compressor + fan) | Factory-matched ±5% tolerance | OEM part P291-5073RS, superseded by P291-5074R
• OEM vs Generic: OEM capacitors are manufactured to Carrier's exact electrical specifications. Generic units commonly run outside ±10% MFD tolerance, placing stress on compressor windings and reducing service life — especially critical in a hard-starting heat pump compressor application.
• Install difficulty: 2/5 — Always discharge the capacitor fully before handling any terminals. Tools needed: 1/4" nut driver, insulated needle-nose pliers, multimeter (capacitance mode). Photograph all wire connections before removal. Observe HERM / FAN / COM terminal labeling carefully during reinstallation.
• Warranty & Shipping: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse — get your system back online fast.

Also fits with start capacitor P281-8806 (88-108 MFD, 330V) — commonly replaced alongside the dual run capacitor during a hard-start repair on the PH12NA036000AAAA. Check your unit's data plate to confirm MFD and voltage ratings before ordering. Our fitment team is available to verify compatibility before you purchase.