Central heating and air conditioning systems depend upon a system of ducts to do their jobs. The central units cool the air in the summer, then blow it through the ducts to the various rooms in your home. The ducts are usually located behind the walls, in our attic, and other out-of-the-way locations which allow them to do their jobs without getting in the way of your household. But that can make it difficult to spot when leaks or other issues crop up. The good news is that air conditioning technicians can address the problem of leaking ducts quickly and efficiently. But before they can do that, you need to be able to spot the signs that something is wrong.