Air conditioners are a modern convenience that homeowners have come to rely on each day. If you want your air conditioner to be able to meet your family's cooling needs, you must work to maintain your AC unit. Tune-ups provide an HVAC technician with the opportunity to evaluate your cooling system. Minor repairs can be made so that major problems don't sideline your air conditioner in the future. Learn to recognize the signs that your AC system needs a tune-up.