Why HVAC prep belongs on your storm checklist
Hurricane season runs from June through November in Florida, overlapping almost entirely with peak cooling season. Nassau County homeowners should add HVAC system preparation to their storm checklist, because outdoor equipment is vulnerable to wind damage, flooding, and debris impact, and a system damaged during a storm that isn't handled correctly can become a much larger repair problem in the days following. The steps below take less than an hour and can protect a several-thousand-dollar piece of equipment from avoidable damage. They also help ensure your system is ready to run as soon as power is restored after a storm, which matters when August temperatures inside an unpowered house can climb above 90 degrees within a few hours.
Before the storm: securing the outdoor unit
Before a storm arrives, turn off power to the outdoor condenser unit at the exterior disconnect box near the unit, not just at the thermostat. The disconnect is usually a gray or black box mounted to the exterior wall near the outdoor unit. Cutting power at the disconnect protects the unit's electrical components from power surge damage during the storm. Clear the immediate area around the unit of loose objects: lawn furniture, potted plants, hose reels, and decorative items become dangerous projectiles in high winds. Do not attempt to anchor a tarp or cover directly to the outdoor unit before the storm, as tarps that catch wind can become sails that pull the unit off its pad or damage refrigerant lines. A clean, unobstructed unit survives storms better than one that is wrapped.
During the storm
During the storm, leave the unit powered off at the disconnect. Do not attempt to run the HVAC system during high winds or while the storm is active. Modern systems have some surge protection built in, but running electrical equipment during active lightning and unstable grid conditions creates unnecessary risk. Keep interior doors and windows closed to reduce the humidity load on the system when it restarts. If you lose power during the storm, do not attempt to reset breakers or restore power to HVAC equipment until the storm has fully passed and standing water has receded from around the unit.
After the storm: safe restart procedures
After the storm passes and standing water has cleared, inspect the outdoor unit before restoring power. Check for visible damage to the cabinet panels, refrigerant lines, and electrical conduit. Rinse the condenser coil with a garden hose to remove debris and leaf matter that packed against the coil during the storm. If the unit was submerged or surrounded by standing water, do not restore power or restart the system until a technician has inspected it. Water intrusion into the electrical components or motor can cause immediate failure and create safety hazards. Flooding that reaches the motor of the outdoor unit almost always requires professional inspection before the unit is run again. Running a flooded compressor is the fastest way to destroy it.
Post-storm inspection: what to check
Once the unit is clean and appears undamaged, restore power at the disconnect and test the system in cooling mode. Monitor for unusual sounds, vibration, or weak airflow for the first few minutes of operation. A system that runs normally and produces cold air through the vents is likely undamaged. A system that trips the breaker immediately, produces unusual grinding or rattling, or fails to cool normally needs a service call before being operated further. Also inspect the attic or air handler closet for signs of water intrusion through roof damage that may have affected ductwork or the air handler itself. Storm-related ductwork damage is common and may not be obvious from outside the home.
The best storm prep is spring maintenance
The most effective hurricane preparation for your HVAC system is the spring tune-up scheduled in April or May, before both the heat of summer and storm season arrive. A properly maintained system enters the season with clean coils, verified refrigerant charge, tight electrical connections, and a clear condensate drain. Systems in good mechanical condition recover faster and sustain less secondary damage after weather events. If your spring maintenance visit hasn't happened yet and storm season is approaching, call us to schedule it. A pre-season tune-up also gives your technician a chance to identify any repairs that should be addressed before a storm makes a breakdown certain.