{"product_id":"carrier-py2pnb042090aa-capacitor-42kxl1","title":"OEM Carrier Single Run Capacitor for PY2PNB042090AA — P291-0403","description":"\u003ch1\u003eOEM Carrier Single Run Capacitor for Model PY2PNB042090AA (P291-0403 \/ P291-1503)\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM single run capacitor for the \u003cstrong\u003eCarrier PY2PNB042090AA\u003c\/strong\u003e packaged unit. A single run capacitor provides the continuous phase-shifted current needed to keep the compressor or fan motor running smoothly after startup. When it degrades or fails, you'll typically notice a humming compressor that won't turn over, intermittent short-cycling, or a complete no-start condition — all classic signs of capacitor failure in a packaged residential or light-commercial unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Single run capacitor | Factory-matched MFD and voltage rating | Cylindrical case | ±5% OEM tolerance | Replaces OEM part numbers \u003cstrong\u003eP291-0403\u003c\/strong\u003e and \u003cstrong\u003eP291-1503\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier replacement, manufactured to exact factory MFD tolerance. Generic capacitors are often rated at ±10%, which increases thermal stress on motor windings and shortens compressor service life — a hidden cost that far exceeds any upfront savings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Always discharge the capacitor fully before handling any terminals. Tools needed: 1\/4\" nut driver, needle-nose pliers, and a multimeter to verify MFD output. Photograph all wiring connections before disconnecting the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty included. Orders placed before cutoff ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the \u003cstrong\u003eCarrier PY2PNB042090AA\u003c\/strong\u003e packaged unit. Always cross-reference the MFD and voltage ratings printed on your existing capacitor's label or the unit's data plate before ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640538943859,"sku":"CARRIE-PY2PNB042090AA-CAPACITOR-P291-0403","price":52.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640538976627,"sku":"CARRIE-PY2PNB042090AA-CAPACITOR-P291-0403-GEN","price":46.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-capacitor-P291-0403_306718cc-d2ac-4488-a75d-d702ab6c5346.jpg?v=1775039546","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2pnb042090aa-capacitor-42kxl1","provider":"National HVAC Parts","version":"1.0","type":"link"}