South Florida Hurricane HVAC Checklist

Quick summary

The sections below cover the full storm-season protocol for AC systems in South Florida, but here’s the at-a-glance version. Before the storm, schedule a tune-up and document the system. During the storm, power down at the breaker and stay away from the outdoor unit. After the storm, wait for the all-clear, inspect the unit visually, and document any damage before resuming normal cooling operation.

• Before the storm: schedule a pre-season tune-up, document the system with photos, top off filter supply, verify warranty registration
• During the storm: power down the AC at the breaker before the strongest winds arrive, don’t run the system during heavy rain or flooding, stay away from the outdoor unit
• After the storm: wait for an all-clear, visually inspect the outdoor unit, listen for unusual sounds on first power-on, document any damage with photos
• When to call: visible debris damage, water inside the indoor unit, AC won’t start, runs but cools poorly, unusual sounds or smells

Why South Florida HVAC needs special storm prep

The Atlantic hurricane season runs June 1 through November 30 (NOAA National Hurricane Center, 2025), six months of risk window that overlaps almost exactly with Florida’s peak cooling demand. From 1980 through 2024, Florida experienced 94 separate billion-dollar weather and climate disasters including 36 tropical cyclone events (NOAA NCEI, 2025), more than any other state. The combined pressure of a six-month storm window and a five-month full-load cooling season creates conditions on residential AC equipment that no other US region faces.

Florida’s 8th Edition Building Code defines a High-Velocity Hurricane Zone covering Miami-Dade and Broward, where outdoor HVAC components and openings must be designed for wind speeds well above 170 mph (Florida Building Code, 2024). The HVHZ rules require hurricane straps, properly anchored equipment pads, and impact-rated exterior penetrations. Palm Beach County uses the standard Florida Building Code wind-load provisions. The mounting requirements aren’t just regulatory checkboxes. They’re engineering specifications that determine whether an outdoor unit stays put during a Category 3 storm or breaks loose and damages the home.

Lightning is the second pressure. Florida’s lightning environment is the most active in the United States. Grid surges during summer storms can damage AC compressor electronics and capacitors, which makes whole-home and outdoor-unit surge protection a recommended add-on for every install. A direct strike will damage almost any equipment, but indirect surges from a nearby strike or grid disturbance handle the much more common path of compressor death during storm season.

Coastal homes face a third pressure. Outdoor coil service life on uncoated equipment installed near the coast can run 30 to 50 percent shorter than comparable inland installs, which makes pre-storm coil cleaning and post-storm inspection more important on coastal homes. Salt-driven corrosion combined with storm-driven debris loads creates an outdoor unit environment that drier and inland markets don’t see.

Before the storm: pre-storm checklist

Pre-season prep starts in April or May, and storm-specific prep starts 48 to 72 hours before landfall when the National Hurricane Center issues a hurricane watch or warning. The pre-season list below covers the work that should be done annually before June 1, and the storm-specific list covers the actions taken when a named storm threatens South Florida.

Step 1: Annual pre-season tune-up

An annual professional AC tune-up before the start of hurricane season prepares the system for peak summer runtime and identifies issues that could fail during a storm. The tune-up should cover coil cleaning, refrigerant pressure check, filter replacement, condensate drain clearing, and electrical inspection. You can schedule the tune-up in April or May before storm season picks up. A weak capacitor or a low refrigerant charge that the tech catches in May saves a compressor burn-out in August.

Step 2: Surge protection

A whole-home surge protector at the breaker panel and an outdoor-unit-specific surge device handle the indirect surges from nearby lightning strikes and grid disturbances that cause most lightning-related compressor damage in Florida. Both protective devices have a service life. Both should be inspected during the annual maintenance visit, and after a major storm season the whole-home surge protector itself may need replacement because each surge it absorbs reduces its remaining capacity.

Step 3: Build a pre-storm documentation file

Take photos of the outdoor unit in clear light from multiple angles. The pre-storm photo set establishes the condition baseline that an insurance claim relies on. Your photo file should cover the cabinet, the pad, the line set connections, and the area around the unit before storm season. Most manufacturers require online warranty registration within 60 to 90 days of installation for full warranty coverage. You should keep the model number, serial number, and AHRI Directory match number on file in a safe place, because you’ll need all three for insurance claims and warranty service after a storm. Refer specific coverage and claim filing questions to your insurance carrier or a licensed public adjuster.

Step 4: Top off filter supply

You should keep at least two spare air filters in the recommended MERV rating on hand before hurricane season, because filters can be hard to source post-storm during widespread power restoration and supply chain disruptions. Big-box stores run out of common filter sizes within hours after a major storm, and the AC system needs a clean filter to run efficiently when power comes back. Plan ahead.

Step 5: When prepping, clear the area around the outdoor unit

On the day of prep, walk the perimeter of the outdoor unit and remove anything that could become a projectile in 100 mph winds. Patio furniture, potted plants, garden tools, and bird feeders all become threats to the outdoor coil and the home itself. Tree limbs within 10 feet of the unit should be trimmed before storm season. The pad-and-strap mounting holds the unit in place against wind, but loose objects in the air can punch through the coil fins.

Step 6: Pre-cool the home if a storm is imminent

Pre-cooling the home a few degrees below the normal setpoint before a storm makes landfall puts cooling thermal mass in the walls and furniture. That stored cool keeps the indoor temperature comfortable during the first several hours of a power outage with the AC powered down. You can drop the thermostat to 68 to 70 degrees Fahrenheit four to six hours before landfall, then power the system off at the breaker about an hour before the strongest winds arrive.

Step 7: Know how to shut off your AC at the breaker

On the breaker panel, find the disconnect labeled for the outdoor unit (often labeled AC or condenser on the panel) and the indoor air handler. Both breakers need to be off before the strongest winds and rain arrive. You should practice the location once before storm season so the action is muscle memory when it matters.

During the storm

The during-the-storm protocol is short. Power down the system before the worst of the storm hits, stay away from the outdoor unit, and resist the urge to peek outside.

You should power down the AC system at the breaker before the strongest winds arrive. Two reasons. First, grid voltage fluctuates during a tropical storm or hurricane and can damage compressors, capacitors, and control boards on a system that’s running. Second, water can intrude through the outdoor unit during heavy rain or flooding, and a powered system pulls more water than an unpowered one. Powering down at the breaker eliminates both risks for the duration of the storm.

If the home has a portable or standby generator, running a central AC on backup power is rarely a good idea during the storm itself. The generator has to handle the compressor startup surge, which is typically two to three times the system’s running watts. A generator wired to backfeed an undersized panel can damage the compressor on startup. Consult an electrician before attempting AC operation on backup power.

Stay away from the outdoor unit during the storm. Flooded outdoor units are a serious electrical hazard, and the water intrusion damage isn’t visible until power is restored.

After the storm: post-storm assessment

The post-storm sequence is more deliberate than the pre-storm one because the system may have damage you can’t see. Run these checks in order before any cooling cycle. After a storm, you should wait for an all-clear signal before powering on the system. Visually inspect the outdoor unit for debris, displacement, water damage, and unusual sounds before resuming normal cooling operation.

Step 1: Wait for utility all-clear

Don’t restore breakers until the utility confirms the grid is stable in your area. Restoring a breaker on an unstable grid can damage equipment when voltage swings during the restoration process. Florida Power and Light, along with other regional electric utilities, posts grid status during and after storms, and the all-clear signal is a documented event you can confirm before flipping a breaker.

Step 2: Visual inspection of the outdoor unit

Walk to the outdoor unit in daylight. Look for debris on the coil, displacement of the unit on its pad, water level marks above the base of the unit, and visible damage to the cabinet or fan. If the unit moved, if the cabinet shows impact damage, or if water marks indicate flooding above the base, don’t power the system on. Call a tech.

Step 3: Listen for unusual sounds on power-on

If the outdoor unit looks intact, restore breakers and turn the thermostat to cool. Listen during the first 60 seconds for grinding, screeching, electrical buzzing, or vibration outside the normal range. Any unusual sound is a stop signal. Power down at the breaker and call a tech.

Step 4: Check inside for water damage

You should walk the indoor air handler area. Look for water stains on the ceiling, floor, or wall around the air handler closet. Smell for mold, electrical burn, or refrigerant odor. Indoor water intrusion through a damaged duct or ceiling can show up days after the storm, so re-check during the first week after restoration.

Step 5: Test thermostat and airflow

You can set the thermostat to 75 degrees and confirm air comes out of every register at the right temperature within 5 to 10 minutes. Uneven airflow or warm-air output points to damage to the air handler, the ductwork, or the refrigerant line set.

Step 6: Document any damage with photos

Take photos of any damage immediately. Date stamps on the photos help insurance claims. Multiple angles, multiple lighting conditions, and side-by-side comparisons with the pre-storm photos build a strong claim file.

Step 7: Schedule a professional post-storm inspection

Even if the system runs normally after restoration, a professional post-storm inspection catches damage that surfaces over the next several weeks. Refrigerant leaks from a stressed line set, electrical damage from voltage swings during restoration, and coil fouling from storm debris can all show up after the initial post-storm period.

Insurance documentation

This section covers the procedural side of an insurance claim related to HVAC damage. Specific coverage decisions, deductibles, and policy interpretation belong to your insurance carrier and a licensed public adjuster, not to your HVAC contractor.

The documentation that supports an insurance claim includes pre-storm and post-storm photos of the outdoor unit and indoor air handler, the equipment manufacturer model number and serial number, the AHRI Directory match number from the original install paperwork, and the date and detail of any professional service visits in the 12 months before the storm. Refrigerant work, including emergency repair after storm damage, requires EPA Section 608 certified technicians under the Clean Air Act, and homeowners should never attempt refrigerant work themselves regardless of the urgency. Any post-storm refrigerant repair generates documentation that the insurance carrier needs.

If a claim is disputed, the homeowner can engage a licensed public adjuster. Public adjusters work for the homeowner, not for the insurance carrier, and Florida licenses them under the state department of financial services. The adjuster handles the claim filing, the negotiation with the carrier, and the documentation of damage. Air Nifty doesn’t recommend specific public adjusters because the relationship is the homeowner’s to manage, but a tech can provide the equipment documentation that the adjuster needs.

A few things to avoid. Don’t sign over insurance benefits to a contractor without reviewing the assignment-of-benefits agreement with a licensed public adjuster or attorney. Don’t accept the first claim offer without comparing it to the actual repair or replacement cost. Don’t dispose of damaged equipment until the claim is settled, because the insurance carrier may want to inspect it.

The timeline matters too. Almost every Florida homeowner policy requires the homeowner to notify the carrier of a loss within a defined window after the storm event. The exact window is in your policy, but a sensible default is to file the initial notice within the first week after the all-clear and follow up with full documentation as soon as repair estimates are in hand. Delays can be used as a reason to deny or reduce a claim, so the speed of the initial notice matters even when the full repair scope isn’t clear yet.

Keep the documentation in one place. A folder on your phone or a printed envelope with the model and serial photos, install paperwork, AHRI Directory match number, prior service receipts, and post-storm photos in chronological order makes the claim much easier to handle than a scattered collection. The insurance adjuster, the public adjuster (if you’ve hired one), and the HVAC technician may all need access to the same documents at different points in the claim.

When to call Air Nifty for a post-storm inspection

Most homeowners can complete the visual inspection and listening checks above, but anything beyond a clean visual and a quiet startup belongs in a licensed technician’s hands. The conditions below all warrant a service call. Refrigerant work, electrical diagnosis, and coil cleaning all require professional tools and certifications.

You should call a technician for a post-storm inspection if any of the following apply. Each item below is a stop signal that points to damage beyond a homeowner-level visual check.

• Visible damage to the outdoor unit (debris impacts, displacement, dents)
• Water inside the indoor air handler closet
• The AC won’t turn on after power is restored
• The system runs but cools poorly across the entire house
• Unusual sounds, smells, or vibration on first power-on
• The system is over 10 years old and took any direct exposure
• Storm-driven debris is visible on the outdoor coil

Air Nifty technicians dispatch from offices in Margate and Palmetto Bay across Miami-Dade, Broward, and Palm Beach counties under Florida HVAC license CAC1824313. We diagnose post-storm damage, document findings for insurance claims, and complete repairs that pass county code inspection.

Service areas covered by the post-storm program

Air Nifty serves twelve South Florida cities listed on the airnifty.com homepage including Boca Raton, Coral Springs, Fort Lauderdale, Deerfield Beach, Delray Beach, Sunrise, Plantation, Pembroke Pines, Boynton Beach, West Palm Beach, Hollywood, and Weston across Miami-Dade, Broward, and Palm Beach counties. Coastal cities (Hollywood, Boca Raton, Boynton Beach, West Palm Beach) face higher post-storm inspection demand because of salt-air exposure plus storm-debris exposure. Top-served city pages include Coral Springs and Fort Lauderdale. For the maintenance plan that prepares your AC for hurricane season, see our HVAC maintenance page. For full system replacement after storm damage, see our AC installation page.

For homeowners considering a system upgrade after recurring storm damage, Air Nifty installs three manufacturer brands at named program tiers including Lennox Authorized Dealer, Rheem Preferred Dealer, and Daikin Comfort Pro. The brand options come up during the in-home assessment, and the recommendation depends on the home’s coastal exposure, ductwork condition, and humidity-control priorities.

FAQs

Should I leave my AC on during a hurricane?

No. Power down the AC at the breaker before the strongest winds arrive. Grid voltage fluctuations during a storm can damage compressors and capacitors, and water intrusion through the outdoor unit during heavy rain or flooding compounds the damage. The pre-cool-then-power-down sequence is the right approach.

Will my insurance cover storm damage to my AC?

Coverage depends on your specific homeowners policy and the cause of damage. Wind damage and falling debris are typically covered. Flood damage is usually a separate flood policy. Surge damage may or may not be covered depending on the policy. Refer specific coverage and claim filing questions to your insurance carrier or a licensed public adjuster.

How long after a power outage can I run my AC?

Wait for the utility all-clear and then visually inspect the outdoor unit before powering on. If the unit looks intact, restore breakers and listen for unusual sounds during the first 60 seconds of operation. Any unusual sound is a stop signal. If the system runs normally, schedule a professional post-storm inspection within the first two weeks.

Do I need a surge protector for my outdoor unit?

A whole-home surge protector at the breaker panel combined with an outdoor-unit-specific surge device handles the indirect surges from nearby lightning strikes that cause most lightning-related compressor damage in Florida. Air Nifty installs both during a service visit. The cost is small relative to a compressor replacement, and Florida’s lightning environment is the most active in the United States.

What’s the difference between a tune-up and a post-storm inspection?

A tune-up is the annual preventive maintenance visit that cleans the coil, checks refrigerant, replaces the filter, clears the condensate drain, and inspects electrical components. A post-storm inspection looks specifically for storm damage including debris on the coil, displacement of the outdoor unit, water intrusion in the air handler, and electrical damage from voltage swings during grid restoration.

Can I clean debris off my outdoor unit myself?

Light debris (leaves, small branches) can be cleared by hand with the breaker off. Don’t open the cabinet, don’t touch the wiring, don’t spray water on a powered unit, and don’t attempt to remove anything that’s wedged into the coil fins. Bent fins should be combed by a tech with a fin comb, not by the homeowner.

How do I find my AC’s model and serial number for an insurance claim?

The model number and serial number are on a metal nameplate on the outdoor condenser unit and the indoor air handler. Both are typically near the electrical access panel. Photograph both nameplates clearly. You should pair the photos with the AHRI Directory match number from the original install paperwork to give the insurance carrier complete equipment identification.

Related reading: filing a hurricane HVAC insurance claim and how your AC and roof work together.

About the Author

Sean Daly is the owner of Air Nifty Air Conditioning, a family-operated South Florida HVAC contractor founded in 1997. Air Nifty holds Florida HVAC contractor license CAC1824313 and operates from offices in Margate and Palmetto Bay, serving Miami-Dade, Broward, and Palm Beach counties.