OEM Carrier Single Run Capacitor P291-3504 for Model YAC3680YAC106

This OEM single run capacitor (part number P291-3504) is the factory-specified replacement for the Carrier YAC3680YAC106 split-system air conditioner. A single run capacitor provides the continuous electrical charge needed to keep either the compressor or the condenser fan motor running at peak efficiency throughout each cooling cycle. When this capacitor begins to fail, you'll commonly experience symptoms such as a loud humming with no motor movement, intermittent hard starting, a tripped breaker, or a system that short-cycles and shuts down within minutes of startup.

• Specs: Single run capacitor | Factory-matched MFD and voltage rating | Round or oval case (factory original) | Meets OEM ±3% microfarad tolerance for precise motor protection
• OEM vs Generic: This is a genuine OEM Carrier part, manufactured to exact factory specifications. Generic alternatives commonly carry a ±10% MFD tolerance, which places added thermal stress on the motor windings and can significantly shorten compressor or fan motor service life.
• Install Difficulty: 2/5 — Always discharge the capacitor fully before handling any terminals. Recommended tools: 1/4" and 5/16" nut drivers, needle-nose pliers, and a multimeter capable of MFD measurement. Photograph all wiring connections before disconnecting the old capacitor.
• Warranty: Backed by a 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Designed specifically for the Carrier YAC3680YAC106 condenser unit. Always verify the MFD and voltage ratings on your unit's data plate before ordering to confirm fitment. Not sure? Our HVAC parts specialists are available to verify compatibility before you complete your purchase — get it right the first time and avoid costly return shipping.