09/01/2026
Why won't my AC turn back on after the power blinks out?
Storm rolls through, the lights flicker, everything else comes back, and the AC just sits there. It is one of the most common calls we get after a summer storm.
Start with the good news. Sometimes this is the system protecting itself. Many thermostats and control boards hold a built in delay of about five minutes before letting the compressor restart. That delay exists so the compressor is not asked to start against high refrigerant pressure, which is what destroys them. Give it a full ten minutes before you assume anything is wrong.
If it is still dead after that, check the breakers. Look at the panel, and check the outdoor disconnect box by the condenser too, since a lot of people do not know that second one exists. Reset the breaker once. If it trips again right away, stop and leave it alone. A breaker tripping repeatedly is telling you something is drawing too much current, and forcing it is how a bad capacitor turns into a burned out compressor.
Then look at your thermostat. If the screen is blank, the flicker may have knocked out the low voltage side, and that is often a blown fuse on the control board.
The part that catches people is when the power blink was actually a surge. That can take out a control board or capacitor instantly, and the system will never come back on its own.
Do not keep flipping the breaker hoping it catches. Call us at (618) 254-0645 and we will find out what the storm actually took out.
