{"product_id":"carrier-fb4asf048000aeaa-capacitor-42n4o5","title":"OEM Carrier Single Run Capacitor P291-1503 for FB4ASF048000AEAA","description":"\u003ch1\u003eOEM Carrier Single Run Capacitor P291-1503 for Model FB4ASF048000AEAA\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM single run capacitor (part number \u003cstrong\u003eP291-1503\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FB4ASF048000AEAA\u003c\/strong\u003e air handler. The run capacitor maintains a continuous phase-shifted current to keep the blower motor running at peak efficiency after startup. When it degrades or fails, the blower motor struggles to start, draws excessive amperage, and may hum loudly before tripping the overload — or it may simply fail to run altogether, leaving your system circulating no conditioned air through the home.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Single run capacitor | Factory-matched MFD rating | 370V or 440V rated (verify against your unit's data plate) | Cylindrical case | ±5% OEM tolerance for precise motor protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM capacitor manufactured to exact factory specifications. Generic replacements commonly carry ±10% MFD tolerance, which accelerates blower motor winding wear and can void equipment warranties. OEM is always the recommended choice for air handler blower applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — A straightforward repair for a qualified technician or experienced DIYer. Required tools: 1\/4\" nut driver, insulated needle-nose pliers, and a multimeter capable of measuring capacitance. \u003cstrong\u003eCritical safety step:\u003c\/strong\u003e Always discharge the capacitor fully before touching any terminals — capacitors store lethal voltage even after power is disconnected. Photograph all wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e Backed by a 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed and tested for the \u003cstrong\u003eCarrier FB4ASF048000AEAA\u003c\/strong\u003e 4-ton air handler. Always confirm the MFD and voltage rating printed on your existing capacitor or the unit's data plate before ordering to ensure a correct match. Have questions about fitment? Our HVAC parts specialists verify compatibility before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909542367603,"sku":"CARRIE-FB4ASF048000AEAA-CAPACITOR-P291-1503","price":21.0,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909542400371,"sku":"CARRIE-FB4ASF048000AEAA-CAPACITOR-P291-1503-GEN","price":16.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-capacitor-round-single-P291-1503_466e9928-d1db-4744-8794-c655b65c2a0e.jpg?v=1782937094","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fb4asf048000aeaa-capacitor-42n4o5","provider":"National HVAC Parts","version":"1.0","type":"link"}