{"product_id":"carrier-py1ppb030040aaaa-capacitor-42kxl1","title":"OEM Carrier Single Run Capacitor 4 MFD 370V for PY1PPB030040AAAA","description":"\u003ch1\u003eOEM Carrier Single Run Capacitor 4 MFD 370V for Model PY1PPB030040AAAA (P291-0403 \/ P291-1503)\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM single run capacitor for the \u003cstrong\u003eCarrier PY1PPB030040AAAA\u003c\/strong\u003e packaged unit. This unit uses two individual single run capacitors — \u003cstrong\u003eP291-0403 (4 MFD 370V)\u003c\/strong\u003e for the condenser fan motor and \u003cstrong\u003eP291-1503 (15 MFD 370V)\u003c\/strong\u003e for the compressor — rather than a combined dual run unit. A run capacitor maintains the continuous phase shift required to keep the motor spinning efficiently. When it degrades or fails, you'll notice symptoms such as a humming motor that won't start, the compressor or fan cycling off shortly after startup, higher-than-normal energy draw, or a complete no-start condition on the affected motor circuit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs (P291-0403):\u003c\/strong\u003e 4 MFD (microfarad) | 370 VAC rated | Oval case | ±5% factory tolerance | Replaces OEM P\/N HC90AA004, HC91CA004, HC90AB004\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs (P291-1503):\u003c\/strong\u003e 15 MFD (microfarad) | 370 VAC rated | Oval case | ±5% factory tolerance | RoHS Compliant | UL Approved with Pressure Sensitive interrupter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e These are genuine Carrier Totaline-series capacitors, reliability-tested to 60,000 service hours with high-grade metallized polypropylene film and 100% electrical testing at the factory. Generic alternatives frequently run outside ±5% MFD tolerance, accelerating motor wear and risking compressor damage over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always discharge the capacitor before handling any terminals. Tools needed: 1\/4\" nut driver, needle-nose pliers, multimeter (capacitance mode). Photograph all wiring before disconnecting. Match MFD and voltage ratings exactly to your unit's data plate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003ePY1PPB030040AAAA\u003c\/strong\u003e packaged unit. Verify both the MFD rating and voltage (370V) on your unit's data plate before ordering. Note: P291-0403 has been superseded by P291-0404, and P291-1503 has been superseded by P291-1504 — our stock reflects the current OEM-equivalent specification. Questions about fitment? Our HVAC parts specialists verify compatibility before you order — \u003cstrong\u003eorder now and ship today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640805380467,"sku":"CARRIE-PY1PPB030040AAAA-CAPACITOR-P291-0403","price":20.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640805413235,"sku":"CARRIE-PY1PPB030040AAAA-CAPACITOR-P291-0403-GEN","price":17.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-capacitor-P291-0403_0c71f0d9-bd61-4e0d-9749-5f2fcd89d9f9.jpg?v=1775039128","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1ppb030040aaaa-capacitor-42kxl1","provider":"National HVAC Parts","version":"1.0","type":"link"}