An air conditioning system is supposed to last you at least 12-15 years, some even run longer if taken care of properly. If you feel your air conditioning unit is not helping you shave costs and/or does not provide you with proper heating and air conditioning, seek out a professional. Oftentimes, air conditioning repairs can cost more than simply installing a new air conditioning system. Ask and compare prices. If you hear any grinding noises or feel you have an air conditioning refrigerant leak, an air conditioning company will need.