Your air conditioner can work very hard in the summer to keep your home comfortable. This produces a lot of wear and tear on key components, which is why routine maintenance can lower your risk of cooling problems. Effective maintenance can even extend the total life span of your air conditioner. In general, the air filter, and indoor and outdoor coils are cleaned. Refrigerant charge and temperature drop are verified. All mechanical and electrical components are cleaned and lubricated as needed.