The answer to 'air handler high energy bills' is that there are several common causes, including a dirty air filter, leaky ductwork, an oversized unit, or an inefficient motor. Symptoms may include the air handler running constantly, uneven cooling, and high energy bills. Solutions can include replacing the air filter, sealing ductwork leaks, ensuring the unit is properly sized, and upgrading to a more efficient motor or variable-speed air handler.
For many air handler issues, a DIY approach may be possible, such as changing the air filter or sealing small ductwork leaks. However, more complex problems like an improperly sized unit or major ductwork repairs often require a professional HVAC technician to diagnose and fix the problem correctly.