Need recommendation of someone to "tune up" our central air conditioners

They're about 16 years old and starting to sound a bit "noisy", though they still work and we're definitely not eager to have to replace any time soon (the home's previous owner's didn't use them that much so we're hoping they have more life left in them). Would love any recommendations of whom to call just to check them out/clean them, etc.; and also what I'd expect to pay to have someone look at our home's 2 central A/C units in the Maplewood area. Thanks in advance!

- robjohn99

John Latella at 973-303-1625  He was recommended to us by a plumber friend and we have used him over the years at our previous house and this one. Pricing seems very reasonable to me. He is thorough and happens to be a nice guy!