click this link faulty thermostat, clogged filter, or a dirty condenser coil. An HVAC professional will clean and tighten all the wires in your thermostat, replace your filter, and clean up your AC condenser and its condenser coil.A: It’s recommended to schedule an AC tune-up at least once a year. However, if you use your system frequently or visit site have an older unit, more frequent check-ups may be necessary.Here are a few common signs that indicate your system might need a tune-up. These signs might help answer any questions you may have about the issue and whether your AC needs attention:As you look over the drain line, pay close attention to any cracks or holes in the drain line which will cause your HVAC system to leak.If your unit is working, it might seem like there’s no reason for a tune-up. However, een momentje if everything seems fine for now, there could be a problem under the hood, waiting to break down when you need it most.