Reviewed by Tom Dickerson · 365 Solutions HVAC & Plumbing · Florida Certified Mechanical CMC1251581
How to Protect Your AC Before a Hurricane Hits St. Johns County
Hurricane season in Northeast Florida runs through November 30, and if you have lived in St. Johns County through even one storm you know the pattern: days of watching the cone, a rush on plywood and water, and then a day or two after the power comes back a wave of air conditioners that will not start. Most of that second wave is preventable. Here is what we tell our own neighbors in Nocatee, Ponte Vedra and St. Augustine to do before a named storm arrives, and how to bring your system back safely afterward.
Before the storm: five things that take one afternoon
- Clear everything within ten feet of the outdoor unit. Flying debris causes more storm damage to AC systems than wind itself. Patio furniture, potted plants, grills, pool toys, loose fence boards, anything that can move can end up inside your condenser’s fins or fan. Trim back branches that overhang the unit. Do not wrap the unit in a tarp or plastic; if it is still running when the outer bands arrive, a wrapped condenser can overheat, and a tarp traps salt-heavy moisture against the coil afterward.
- Pre-cool the house. Run the system a few degrees cooler than normal in the 12 hours before landfall. If you lose power, a well-insulated St. Johns County home holds that cushion for a surprisingly long time, and you will not be tempted to run the AC during the storm itself.
- Shut the system down before conditions get bad. When the storm arrives, turn the system off at the thermostat, and if flooding or a direct hit is forecast, at the breaker too. A running compressor that takes a power flicker, a brownout, or wind-driven rain in the wrong place is how a survivable storm turns into a dead unit. The house will be uncomfortable for a day; that is cheaper than a compressor.
- Check the drain line while the weather’s still good. Our humidity means condensate drain lines are already working hard in September. A line that is half-clogged with algae before a storm becomes a ceiling stain during one, when the system runs nonstop on generator power or right after restoration. If your drain pan has standing water now, deal with it before the storm week.
- Photograph your equipment. Take five minutes and photograph the outdoor unit (including the data plate), the air handler, and the thermostat. If a claim ever needs filing, dated before photos of your equipment make everything that follows simpler. We document our own installations the same way.
After the storm: how to restart without wrecking anything
Wait until standing water around the outdoor unit is gone. If the unit was flooded, even a few inches, do not turn it back on; flood water in the electrical components and compressor is one of the few things that can total an otherwise healthy system. Have it inspected first.
If the unit stayed dry: restore the breaker, wait 30 minutes (many compressors have crankcase heaters that need it after an outage), then start the system at the thermostat. Listen for the first minute. Grinding, buzzing, repeated clicking, or a fan that does not spin means shut it down and make a call.
Give it a few hours to pull the humidity back down before judging performance, a house that sat closed at 88 degrees and 80% humidity takes time to recover, and that is normal.
The beaches caveat
If you’re in Jacksonville Beach, Ponte Vedra Beach, Neptune or Atlantic Beach: storms drive salt spray miles further inland than usual. After any named storm, rinse the condenser coil gently with fresh water from a garden hose (system off). Salt left on the coil is the quiet killer of beach-side condensers.
If something’s wrong
We’re a Nocatee-based, licensed and insured HVAC and plumbing company, we answer 24/7 for emergencies, and you get a written price before any work begins, storm week included. If your system took damage or won’t restart, call us at (904) 460-2998 or book online.
Related service: AC Repair · Emergency AC Repair · AC Maintenance