When a new tenant is moving in, or if you are hearing new noises, calling for general service is a smart thing to do. This gets a detailed inspection of almost everything related to your garage doors and openers. It also helps if you are present so each step can be explained. When there are things wrong you will know the severity and what should be done about them. See this General Service Check-Off list to get an idea of what is covered. The price varies dramatically depending on how complicated the problem was.