AC capacitor is a crucial electrical component in air conditioners that stores energy to give the compressor and fan motors a powerful start and then provides steady power for efficient operation, acting like a temporary battery. These cylindrical devices help prevent hard starts, humming, and sudden shutdowns, with common types including start, run, and dual-run capacitors, which combine functions for both motors. They are essential for motor efficiency, but because they store dangerous high voltage, they require careful handling and often professional replacement, identified by signs like bulging or leaking tops.
