Prepare early by documenting your system and knowing how to turn the thermostat off. After a storm, avoid water and damaged equipment, never use a portable generator for central HVAC, and have flood-exposed equipment inspected before use.
Prepare before the forecast becomes urgent
In Miami-Dade, Broward, and Palm Beach counties, hurricane planning has to account for wind, driving rain, storm surge, and outages during the Atlantic season from June 1 through November 30. Start while conditions are calm: photograph equipment from a safe distance, record model information, and keep your service contact with household records. From the ground, note loose yard items, hanging branches, or an outdoor unit that appears shifted or poorly supported. Schedule a qualified professional to assess concerns well ahead of a named storm.
Your useful homeowner preparation is mostly planning and observation, not taking equipment apart. Make sure household members know where the thermostat is and that setting it to Off is an option if conditions make operation unsafe. Review your evacuation plan and follow local officials if they order an evacuation; protecting people comes first. If your home repeatedly sees standing water near the condenser or air handler, discuss long-term flood-resilience options with an HVAC professional before season, rather than attempting to raise, move, anchor, rewire, or modify the equipment yourself.
When a storm or outage is underway
Do not go outside to check the condenser during high winds, lightning, or flooding. Once it is safe and dry, a visual check from a distance can be useful: look for fallen limbs, displaced equipment, damaged enclosure panels, or water marks. Take photos for your records without touching anything. Normal rainfall on an outdoor unit is not the same as flood exposure, and a visible condition alone cannot tell you whether any part has failed. Leave covers, panels, wiring, refrigerant lines, and damaged supports for qualified technicians.
A portable generator is not a do-it-yourself power source for central air conditioning. Never attempt to connect one to the HVAC system or household wiring, and do not handle a wet generator or connected device. Ready.gov advises using generators outdoors, at least 20 feet from windows, doors, and attached garages, while following the manufacturer’s instructions. Use battery lighting, keep informed through official alerts, and seek an open community cooling location if needed. Do not try to solve an outage by bypassing controls, opening electrical equipment, or repeatedly restarting the AC.
Floodwater changes the next step
Treat floodwater near HVAC equipment as a safety issue, not a cleanup project. Ready.gov warns that floodwater may contain debris, chemicals, waste, pathogens, and electricity from underground or downed lines. Do not wade through it, touch wet equipment, or stand in water while reaching for a thermostat, outlet, breaker, or outdoor unit. Wait for authorities to say it is safe to return and for water to recede. If water entered the home or reached the outdoor unit, air handler, ductwork, or electrical components, leave the system off.
Do not assume a unit is safe because it starts, blows air, or looks unchanged after water recedes. Carrier notes that flood damage can be hidden and may show up later; floodwater is different from ordinary rain and can carry sediment and contamination into equipment. A technician can determine the appropriate next step after inspecting the affected system. Do not hose out, disinfect, open, dry with improvised heat, or try to repair flood-exposed HVAC equipment yourself. Photograph visible damage from a dry, safe location for your records instead.
Return to cooling with a measured check
After utility power is stable and conditions outside are safe, start with simple observations: check that the area around the outdoor unit is clear without moving storm debris, note unusual sounds or odors from a safe location, and confirm whether the thermostat display is operating. Those observations help describe what happened, but they are not a diagnosis. A no-start, weak airflow, noise, odor, or water mark can have more than one cause. Avoid declaring a failed part or ordering a repair based only on one symptom.
A qualified HVAC technician should handle inspection of electrical components, wiring, refrigerant circuits, internal controls, damaged supports, and any equipment exposed to floodwater. The technician can also advise whether cleaning, repair, or replacement is appropriate after an assessment; that decision depends on what the inspection finds. For a pre-season safety review or post-storm diagnosis in Miami-Dade, Broward, or Palm Beach County, contact Cold Supplies at (954) 826-4957 to schedule service.
Frequently asked questions
Should I cover my outdoor AC unit before a hurricane?
No. An improvised cover can become a wind hazard and puts you outside in unsafe conditions. Ask a professional about permanent, system-appropriate protection during calm weather.
Can I turn the AC back on after a hurricane if the power is restored?
Wait until conditions are safe. If water reached HVAC equipment, the unit shifted, or anything is visibly damaged, leave it off and arrange an inspection; observations cannot identify the cause.
Sources & further reading
These independently published references inform the general guidance above; they do not verify Cold Supplies’ business credentials or any specific job.