How often should ac unit be serviced for best results?
If you're sitting there wondering how often should ac unit be serviced, the short and sweet answer is that you should have a pro look at it at least once a year. Most people wait until the air coming out of the vents feels like a lukewarm breeze before they even think about calling a technician, but by then, you're usually looking at a much bigger bill than a simple tune-up. ...