If you live in Palm Beach County, you know the drill by now. June rolls around, the supermarkets start stacking water and plywood sells out somewhere between the first watch and the first warning.
Most hurricane checklists cover the obvious things. Shutters. Generators. Batteries. Important documents.
Your air conditioner almost never makes the list.
That’s a problem, because your AC is one of the most expensive pieces of equipment attached to your home, and it sits outside, completely exposed, during every storm. It’s also the first thing you’ll desperately want working once the storm passes and the whole neighborhood turns into a sauna with no power.
A little preparation goes a long way. Here’s what we recommend to homeowners from Boca Raton up through Jupiter, based on what we see after every storm season.
Why Storms Are So Hard on AC Systems Here
Palm Beach County gets a rough combination during hurricane season: extreme winds, flying debris, storm surge near the coast, flooding rain inland, and power that flickers on and off for days.
Each one of those is a different kind of threat to your cooling system.
- Wind and debris can bend condenser fins, crack fan blades, and knock units off their pads.
- Flooding and storm surge can submerge outdoor units and corrode electrical components from the inside out. This is a big one for homes near the Intracoastal in North Palm Beach, Singer Island, and along the coast.
- Power surges during outages and restoration are one of the most common causes of fried compressors and control boards we see after a storm.
- Salt-heavy storm air accelerates corrosion on coastal systems that were already fighting salt exposure year-round.
The good news? Most of the expensive damage is preventable with about an hour of prep.
Before the Storm: Your AC Prep Checklist
1. Cool the House Down Early
Once a storm is on the way, run your AC a few degrees cooler than normal in the hours before landfall. If you lose power, a pre-cooled house stays comfortable longer — sometimes by half a day or more if you keep doors and windows closed.
2. Turn the System Off Before the Storm Hits
This is the step most people skip. When winds pick up or flooding starts, shut the AC down at the thermostat and flip the breaker for the outdoor unit.
Why? Two reasons. A running system can pull in wind-driven rain and debris. And when the power grid starts failing, voltage spikes can travel straight into a system that’s still connected and running. A tripped grid coming back online is even worse — restoration surges destroy more compressors than the storms themselves.
3. Secure or Clear the Area Around the Outdoor Unit
- Move patio furniture, potted plants, grills, and anything else that can go airborne
- Trim back branches hanging near the condenser
- Check that the unit is bolted to its concrete pad (older installations sometimes aren’t)
- If your unit is elevated on a stand — common in flood-prone spots near Lake Worth Lagoon and the Loxahatchee — make sure the stand is solid
4. Consider a Surge Protector for Your HVAC System
A whole-home or dedicated HVAC surge protector is one of the cheapest insurance policies you can buy in South Florida. Compared to the cost of a new compressor or control board, it usually pays for itself the first time the grid hiccups. Ask about this during your next tune-up — it’s a quick add-on.
5. Don’t Wrap the Unit in a Tarp
It feels protective, but a tarp traps moisture and can shred into the fan. If you want physical protection, use a manufacturer-approved cover or plywood secured properly — and only once the system is powered off.
After the Storm: What to Check Before Turning the AC Back On
The storm passes, the power comes back, and the first instinct is to crank the AC immediately. Wait a few minutes and check these first — it can save you a much bigger repair bill. If you’re unsure, it’s worth understanding the real cost of delaying AC repair in Florida — but also the cost of restarting a damaged system.
Walk Around the Outdoor Unit
- Is the unit sitting level on its pad, or has it shifted?
- Are there branches, palm fronds, or debris lodged in or around it?
- Do the refrigerant lines look bent, kinked, or disconnected?
- Any visible standing water line on the cabinet?
If the Unit Was Flooded, Do Not Turn It On
This one matters, especially for coastal and low-lying neighborhoods. If storm surge or flooding reached your condenser, the electrical components and refrigerant system need a professional inspection before restart. Powering up a flooded unit can short components that would otherwise have been salvageable — and salt water makes it worse.
Listen and Smell on Restart
If everything looks clear, restore the breaker, wait a few minutes, then start the system normally. Warning signs to shut it back down:
- Grinding, buzzing, or rattling from the outdoor unit
- A burning or electrical smell from the vents
- Breaker tripping repeatedly
- The fan not spinning, or spinning unevenly
Any of those means it’s time for a service call, not a second attempt. Our team handles post-storm diagnostics across Palm Beach and Martin County, including emergency visits when the heat won’t wait.
The Week After: Humidity Is the Silent Problem
Here’s the part most homeowners miss. After a storm, your home has usually absorbed days of extreme humidity — especially if the power was out. That moisture doesn’t leave on its own.
We see the same pattern every year in the weeks following a storm:
- Musty smells that show up seven to ten days later
- Condensation on vents and windows
- Drain lines clogging from the sudden moisture load (see our guide on signs your AC drain line is clogged)
- Mold spots in closets and corners with poor airflow
Run the AC consistently after the storm, replace your filter (it worked overtime), and if the sticky feeling doesn’t go away within a couple of days, have the system checked. Sometimes the issue is a struggling system; sometimes it’s an indoor air quality problem worth addressing directly.
When to Schedule Your Pre-Season Tune-Up
Hurricane season runs June through November, but the peak for our area is mid-August through October. If your system hasn’t had a professional inspection this year, now is the right time — not the week a named storm shows up on the forecast cone.
A pre-season tune-up covers the things that matter most in a storm-prone area: electrical connections, refrigerant levels, drain line condition, corrosion on coastal units, and making sure the unit is secure on its pad. Our Florida HVAC maintenance checklist walks through the full list.
Conclusion
Nobody in Palm Beach County needs a reminder that hurricane season is stressful. But your AC doesn’t have to be one of the things you worry about.
Pre-cool the house, shut the system down before the worst of the storm, clear the area around the condenser, and check things over before restarting. If the unit flooded or something sounds wrong on restart, make the call before the damage gets worse.
Southern Mechanical Services helps homeowners throughout Palm Beach and Martin County prepare cooling systems before storms and get them safely back online after. If you want your system checked before the peak of the season — or something doesn’t seem right after the last one — give us a call at (561) 907-6030 or schedule service online.
