OEM Carrier Single Run Capacitor P291-1003 for Model GB3AAV048075AAJA

This OEM single run capacitor (part number P291-1003) is the factory-specified replacement for the Carrier GB3AAV048075AAJA gas furnace/air handler combination unit. A run capacitor maintains the continuous phase shift needed to keep a single-phase motor running efficiently after startup. When this capacitor weakens or fails, you'll notice symptoms such as a humming motor that won't spin up, intermittent shutdowns, overheating, or a complete no-start condition on the blower or condenser fan motor — leaving you without airflow or cooling when you need it most.

• Specs: Single run capacitor | OEM part number P291-1003 | Factory-matched MFD and voltage rating | Round or oval case per OEM specification | ±5% tolerance for precision motor protection
• OEM vs Generic: This is a genuine Carrier OEM capacitor engineered to exact factory tolerances. Generic aftermarket capacitors often carry a wider ±10% MFD variance, which can accelerate motor winding wear, reduce efficiency, and void equipment warranties over time.
• Install Difficulty: 2/5 — Always discharge the capacitor fully before handling any terminals. Recommended tools: 1/4" nut driver, insulated needle-nose pliers, and a multimeter capable of measuring capacitance. Photograph all wiring connections before disconnecting the old unit to ensure correct reinstallation.
• Warranty: Backed by a 1-year OEM factory warranty. Orders placed before our same-day shipping cutoff ship directly from our stocked warehouse — no waiting on backorders.

Compatibility: Designed specifically for the Carrier GB3AAV048075AAJA unit. Always verify the MFD and voltage ratings on your existing capacitor's label or the unit's data plate before ordering to confirm an exact match. Not sure if this is the right part? Our HVAC parts specialists are available to verify fitment before you purchase — ensuring you get the correct component the first time. In stock and ready to ship today.