At DND Heating & Air Conditioning, we perform maintenance on AC units almost all year around. When they spring gets here maintenance is reccomended, but sometimes maintenance on your AC will be recommended in the sumnmer if if it was not performed recently, or you have tons of contton wood clinging to the coils on the outside unit. Now with the outside unit cleaned that is great but we also do a few more things to get your home or buildings AC unit working the most efficent as possible. After the outside unit is cleaned, we come and check the indoor air filter and air flow. With everything moving air like it is supposed to then we have the opportunity to check the freon on the AC system. When your AC is running low on freon you run the risk of having many problems above and beyond a hot home.