Window AC should be serviced every 2 years. It is important to service your window AC unit to ensure proper function and to keep it running smoothly. During a service visit, a technician will clean the unit, check all the components for optimal performance, and make any necessary repairs. If you notice that your window AC is not cooling as effectively as it used to, or if it seems to be making more noise than usual, then it's probably time for a service visit. Contact your local HVAC company to schedule an appointment.

Window AC should be serviced at least once a year to ensure that it is running efficiently and to prevent any potential problems.