Five things to inspect before the heat spikes — most of them take five minutes and can save you a service call.
Florida summers don't ease in — they arrive. By the time you notice your system is struggling, the outdoor unit is already working overtime and your energy bill is climbing. A short walk-around in May or early June catches the small stuff before it becomes an emergency call in August.
1. Change the filter (yes, again)
A clogged filter is the single most common cause of a system that 'suddenly stopped cooling.' Restricted airflow makes the coil freeze, the compressor overheat, and the run time double. In peak season, plan on a fresh 1-inch filter every 30 days. Media filters (4–5 inch) stretch to 6–12 months.
2. Clear the condenser coil
Walk out to the outdoor unit. If you see grass clippings, pollen mats, or a bougainvillea slowly consuming it, gently rinse the fins with a garden hose (top-down, low pressure). Keep two feet of clearance on every side.
3. Check the condensate drain
Your AC pulls gallons of water out of the air every day. That water leaves through a PVC line — usually ending near the outdoor unit. If it's dry when the system has been running, the line is probably clogged. A wet-vac at the outdoor end clears most blockages in under a minute.
4. Listen at the return
Stand near the biggest return grille with the system running. You should hear steady airflow, not a whistle or a shudder. Whistling usually means the filter is too restrictive; shuddering means duct connections have loosened.
5. Watch the thermostat for one full cycle
Set the thermostat 3°F below room temperature and time the cycle. A healthy system in a Florida home should drop that temperature within 15–20 minutes and cycle off. If it runs for an hour and never satisfies, something is wrong — low refrigerant, a failing capacitor, or duct leakage.
If any of these five raise flags, book a tune-up now — before the July heat wave and everyone else's system fails at the same time.