This robust component stores the energy used in turning on an air conditioner. Most AC units come with two-run capacitors, the primary, which works with the compressor and condenser fan motor, and the secondary, which works with the blower motor.
When an AC refuses to turn on or takes time to turn-on, the chances are that the capacitor is faulty. More downsides to ac with malfunctioning capacitor issues include the unit not blowing cold air, going off automatically, or making a humming sound.
Capacitors also tend to fail as the AC ages, and exposure to the sun can make your capacitor fail.