Katrina to Ida: How Storm Outages Damage Covington HVAC Systems

A hurricane does not just cut power, it makes the power dirty. As lines go down and come back, as the grid struggles and utility crews switch circuits, voltage swings wildly. The moment power is restored is often the most dangerous, with a hard surge racing through the lines.

Your HVAC system's compressor and electronic control board are sensitive to those swings. A single big surge can burn out a board or damage a compressor's windings instantly, and repeated brownout-and-restore cycles wear them down over days.

The second killer is human. When the lights come back, the instinct is to flip the AC on immediately for relief in the heat. But if power is still unstable, or if the unit was sitting energized through the surge, that first restart can be the fatal moment.

Starting a compressor into low or fluctuating voltage makes it draw huge current and can seize it. This is why we tell everyone to leave the system off at the breaker during the outage and wait for steady power before restarting.

Whole-home surge protection is the highest-value step. It is a modest cost against a compressor or board replacement, and it works around the clock, not just during storms.

After an outage, watch for a system that will not start at all, that trips its breaker immediately, that hums but does not run, or that runs but blows warm air. A burnt-electrical smell from the condenser or air handler is a red flag to leave it off.

Do not keep resetting a breaker that trips right back, that is a fire risk and a sign of a real fault. One reset to test is reasonable, repeated resets are not.

If your HVAC will not restart cleanly after an outage, if it behaves oddly, or if there was any burnt smell or visible damage, have it inspected before forcing it. Surge damage is often repairable when caught early, and 24/7 emergency dispatch means you are not sweating for days waiting on a diagnosis. Call (327) 210-5999 and we will get a technician out to assess storm and surge damage across St. Tammany Parish.

From Katrina through Ida, Covington homeowners learned that HVAC damage rarely happens while the power is out. The system is simply off and safe. The damage happens in the split second Entergy restores service, when voltage returns dirty, spikes, or sags as the grid rebalances thousands of homes coming back at once. That is when compressors try to restart under bad voltage, capacitors fail, and control boards fry. A system that survived the entire storm can die the moment the lights come back.

Prolonged outages add a second failure mode. After Ida, systems that sat off for a week in September heat came back to swollen capacitors and stiff compressor oil, then failed under the immediate hard load of cooling a hot house. The safest practice, learned across every major Northshore storm, is to switch your thermostat and outdoor disconnect off during the outage and leave them off for a while after restoration, letting the grid stabilize before you ask the compressor to work.

Follow this sequence around any major Northshore storm to keep an outage from becoming a compressor replacement.