What is a Capacitor?What are the symptoms of a bad AC capacitor?

What is a Capacitor?
AC capacitors are used to store energy for a variety of electrical circuits. They also help reduce voltage spikes in the circuit and reduce the chance of fire or explosion.

What are the symptoms of a bad AC capacitor?
Symptoms of a bad capacitor can include humming from the motor, the unit taking a long time to turn on, or cold air not blowing from the vents. If any of these symptoms apply to your AC unit, you may have a bad capacitor and need to test it.