The answer to 'AC high energy bills' is that there are several common causes, including an oversized AC unit, poor insulation, air leaks, and inefficient equipment. These issues can lead to the AC system working harder than necessary, resulting in higher energy consumption and bills.
Symptoms of these problems may include uneven cooling, the AC running constantly, and high humidity levels in the home. Solutions can involve upgrading to a properly sized unit, sealing air leaks, improving insulation, and replacing old, inefficient equipment. Some of these fixes can be done as DIY projects, but for more complex issues, it's best to call in a professional HVAC technician to diagnose and resolve the problem.