Updated November 1, 2026 · Reviewed for accuracy by a licensed Uniform HVAC technician before publication
ENERGY STAR recommends checking your filter every month, changing it at least every three months, and having a professional check the system before the cooling season. See the ENERGY STAR maintenance checklist. In Southwest Florida, where AC runs most of the year, that pre-season check really means "before the hot, humid months," and many homes benefit from a second visit.
A practical Southwest Florida schedule
| How often | What | Who |
|---|---|---|
| Monthly | Check the filter; replace when dirty | You |
| Monthly in summer | Look at the drain pan and condensate line outlet | You |
| Every spring | Professional tune-up: coils, drain, electrical, refrigerant check | Licensed technician |
| Every fall (recommended) | Second visit for year-round use, older systems or recurring drain clogs | Licensed technician |
| Before leaving for the season | Drain flush and float switch test | Technician or home watch |
Who should consider twice a year
- Systems that run most days of the year
- Homes with a history of drain clogs
- Coastal homes with salt exposure
- Systems more than ten years old
- Seasonal homes left closed in summer
Warranty caveat
Many manufacturer warranties require registration and may require proof of regular professional maintenance. Read your warranty, and keep the written summary from every visit.