The answer to 'tune-up leaking water' is that a leaking water issue during an HVAC tune-up can have several common causes, including condensate drain clogs, refrigerant leaks, or issues with the condensate pump. Symptoms may include water dripping from the unit, standing water around the system, or increased humidity in the home.
In many cases, a DIY fix is possible, such as clearing a clogged drain or replacing a faulty condensate pump. However, if the leak is due to a refrigerant issue or a more complex problem, it's best to call in a professional HVAC technician to diagnose and resolve the issue properly.