Depending on the type of air conditioner you own, you should aim to have it serviced at least twice a year, before cold and hot weather sets in. Professional services may vary depending on the climate of your region and the efficiency of the unit given its age, but are typically recommended once in the spring and again in autumn.
A well-maintained AC system can significantly reduce energy costs, improve cost-effectiveness as well as prolong its operational life for many years to come. Make sure you hire a certified technician who has experience with your make and model so that you can enjoy peace of mind from knowing that your air conditioning is functioning properly.