Is your air conditioner not performing as well as it once did? As the days pass by, we sometimes overlook HVAC units. If that's the case, your air conditioner may need some maintenance. Check our list of common mistakes. 1. You aren't changing or cleaning your air conditioning filters. You should change the filter at your indoor unit at least once every month. This will ensure the indoor coil stays as clean as it can during the higher use months. 2. You aren't getting your sy