{"product_id":"carrier-fb4asa048000aaaa-capacitor-42n4o5","title":"OEM Carrier Single Run Capacitor P291-1503 for FB4ASA048000AAAA","description":"\u003ch1\u003eOEM Carrier Single Run Capacitor P291-1503 for Model FB4ASA048000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM single run capacitor (part number \u003cstrong\u003eP291-1503\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier FB4ASA048000AAAA\u003c\/strong\u003e air handler. Unlike dual run capacitors, a single run capacitor is dedicated solely to the blower motor, providing the precise electrical charge required to start and maintain efficient motor operation. When this capacitor fails, you'll typically notice the blower motor humming without spinning, the air handler failing to move air entirely, or the system tripping on thermal overload due to motor strain — all signs pointing to a capacitor that can no longer hold its rated charge.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Single run capacitor | Factory-matched MFD rating | 370V\/440V rated | Round or oval case (verify against data plate) | OEM part number P291-1503 | ±5% tolerance per factory spec\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 tolerances. Aftermarket units commonly deviate ±10% or more in MFD rating, placing unnecessary stress on the blower motor windings and significantly shortening motor service life — a far more expensive repair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Always discharge the capacitor fully before handling any terminals (use an insulated resistor or dedicated discharge tool). Tools needed: 1\/4\" nut driver, needle-nose pliers, and a multimeter to verify the old capacitor has failed. Photograph all wiring connections before removal to ensure correct reinstallation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e Backed by a 1-year OEM factory warranty against defects. 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 Designed specifically for the Carrier \u003cstrong\u003eFB4ASA048000AAAA\u003c\/strong\u003e 4-ton air handler. Always cross-reference the MFD and voltage rating printed on your existing capacitor and the unit's data plate before ordering to confirm an exact match. Our parts specialists are available to verify fitment — don't guess on a capacitor replacement. \u003cstrong\u003eOrder today and your part ships same business day.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909542629747,"sku":"CARRIE-FB4ASA048000AAAA-CAPACITOR-P291-1503","price":21.0,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909542662515,"sku":"CARRIE-FB4ASA048000AAAA-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_a65d8747-9e4c-48bf-a48c-575c56361dea.jpg?v=1782937089","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fb4asa048000aaaa-capacitor-42n4o5","provider":"National HVAC Parts","version":"1.0","type":"link"}