air conditioners once a year once a year air conditioning is serviced professional should inspect every year year-round savings Angie’s List Preventative checkups cleaning of the AC keep it running well service the air conditioner annually save you 15% on your cooling costs up to 5 percent in the proper condition we are already prompting homeowners to get their ACs checked air conditioning units How often should I have my HVAC equipment serviced ? lose up to 5 percent efficiency every year 5% each year. once a year article published by Angie’s List AC systems once a year cleaning of the AC Angie’s List air conditioning units All Hi-Tech Heating has more than 10 years experience once a year keep it running well save as much as 15% on your monthly energy bill air conditioner needing a tune-up every 1-2 years reasons for an AC tune-up