How often should you service your air conditioner?
Once a year.
Best month: April (Northern Hemisphere)
How to do it
Book a tune-up before the hot season, or at least clear leaves and debris from around the outdoor unit and hose the fins gently.
Why it matters
Most AC breakdowns happen on the first hot week, when every technician is busy.
Recommended interval: once a year, per ENERGY STAR (U.S. EPA).
General guidance for a typical home; the manufacturer's instructions come first.