After lighting a stick of incense, you can wave the smoke gently around the ducts. The direction of the smoke will tell you whether or not your unit is suffering from a leak. A company offering HVAC repairs in Montgomery County can help you diagnose and repair any leak that is affecting your air conditioner or ductwork. With the services of an air conditioner maintenance professional, you will be able to pinpoint and seal any leaky areas of your air conditioner. After you have eliminated any leaks, you will be amazed at the efficiency of your system and how much money you’re saving as a result.