There are several signs that you need help:
Not Cooling – Your AC system is not cooling your home to a comfortable temperature.
Uneven Cooling – There are various temperatures throughout the different rooms of your home.
Noisy Operation – You hear loud noises coming from your air conditioner when it is in use.
Visible Damage – You see leaks in your AC ductwork, or cracks in your equipment.
Poor Air Quality – The air in your home has an odor, or you suspect pollutants or contaminates.