{"product_id":"carrier-ph4zna030000aa-capacitor-upzmv8","title":"OEM Carrier Dual Run Capacitor 35+5 MFD 440V — PH4ZNA030000AA","description":"\u003ch1\u003eOEM Carrier Dual Run Capacitor 35+5 MFD 440V for Model PH4ZNA030000AA\u003c\/h1\u003e\u003cp\u003eThis OEM dual run capacitor (part# \u003cstrong\u003eP291-3554RS\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH4ZNA030000AA\u003c\/strong\u003e heat pump condenser. The dual run capacitor serves double duty — it stores and delivers the electrical charge needed to start and sustain both the compressor and the outdoor condenser fan motor simultaneously. When it degrades or fails, common symptoms include a loud humming with no motor movement, the compressor short-cycling, the fan spinning slowly or not at all, or the unit tripping the breaker under load. A failed capacitor is one of the most common and easily overlooked causes of a no-cool call in the field.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 35+5 MFD (microfarad) | 440V rated | Round case | ±6% tolerance | 50\/60 Hz | 10,000 AFC | Castor oil protected | No PCBs | UL recognized\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM part (P291-3554RS), built to exact factory tolerances. Generic capacitors often carry a ±10% MFD tolerance, which can accelerate compressor wear and reduce motor life over repeated start cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always discharge the capacitor fully before touching terminals. Tools needed: 1\/4\" nut driver, needle-nose pliers, multimeter. Photograph all wiring before disconnecting. The round case mounts in a standard capacitor bracket — no modification required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships same business day from our warehouse — get your system back online fast.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered to fit the \u003cstrong\u003eCarrier PH4ZNA030000AA\u003c\/strong\u003e heat pump condenser. Always verify the MFD rating and voltage against your unit's data plate before ordering. Note: Carrier sources capacitors from third-party manufacturers — the label on the capacitor may reflect the component maker rather than Carrier. Have a fitment question? Our HVAC parts team verifies compatibility before you order — reach out before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641161306483,"sku":"CARRIE-PH4ZNA030000AA-CAPACITOR-P291-3554RS","price":24.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641161339251,"sku":"CARRIE-PH4ZNA030000AA-CAPACITOR-P291-3554RS-GEN","price":21.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-capacitor-P291-3554RS_aea90909-679e-4b1c-bd08-2fc58022ad8e.jpg?v=1775028615","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph4zna030000aa-capacitor-upzmv8","provider":"National HVAC Parts","version":"1.0","type":"link"}