There is general maintenance that can be done to your A/C unit to make sure it is running at an optimum level. One of the first things an air conditioning technician will do is check all of your filters. They will also check around the outside area the outside unit to make sure it is clean and there are no leaves or twigs caught in the unit. Checking the refrigerant level, and making sure there is no leakage or blockage is something that requires someone who knows what they are doing. For more information visit Ball & Sons Heating Co Ltd.