When your air conditioner breaks down during summer heat, the first thing to do is stay calm and check the basics. Look at your thermostat to make sure it’s set correctly, check that the power is on, and see if your air filter is clogged. If these simple fixes don’t work, turn off your AC to avoid damage, open your windows to let in cooler air, and call a repair person right away. While waiting for help, stay hydrated and move to the coolest part of your home.
A broken AC unit in the middle of summer is stressful because the heat builds up fast, and waiting for a repair person can feel like it takes forever. Most AC problems happen when you need your unit the most—during heat waves when everyone else is also calling for repairs. The good news is that many common issues can be fixed quickly, and there are ways to stay comfortable while you wait. Understanding what steps to take right after your AC fails can save you time and money.
Check the Simple Things First
Before you panic and call for repairs, spend a few minutes checking the easy stuff. Walk over to your thermostat and make sure it’s set to cool mode and that the temperature setting is lower than the current room temperature. This sounds basic, but plenty of people accidentally switch their thermostat to heat or fan-only mode without realizing it. Also check that your AC unit has power by looking at the breaker box—a flipped breaker can shut down your whole system in seconds.
Next, look at your air filter. If it’s very dirty or clogged, air can’t flow through your system properly, and your AC might shut itself off as a safety measure. A clogged filter is one of the most common reasons for AC problems, and replacing it costs almost nothing. Most filters are easy to find near your furnace or air handler, and you can replace one yourself in just a few minutes. If the filter is dirty, swap it out for a new one and see if your AC starts working again.
Turn It Off and Create Airflow
If the simple checks don’t fix the problem, turn your AC unit off right away. Running a broken AC can damage it further and waste energy. Once it’s off, open windows and doors to let outside air move through your home. Even on a hot day, the breeze from open windows helps, and you can create better airflow by opening windows on opposite sides of your house.
Set up fans to help move the air around. Ceiling fans, window fans, and portable fans all help, and using fans while your AC is broken costs much less than running a broken unit. Close doors to rooms you’re not using so the fans focus on cooling the spaces where you spend the most time. At night, open windows if the temperature drops below your indoor temperature—many summer nights cool down enough to make a real difference.
Call a Professional Right Away
Once you’ve done the basics, call an AC repair company. During summer, good repair people get busy fast, so calling early in the day gives you a better chance of getting someone out the same day. When you call, tell them exactly what happened and what you’ve already checked. Explain whether your AC just won’t turn on, is making strange noises, or isn’t blowing cold air—these details help the repair person figure out what tools to bring.
Be ready for the fact that summer is peak season for AC repairs, so appointments can be hard to get. Some companies charge extra for same-day service or emergency calls, but that might be worth it during a heat wave. Ask upfront what the service call will cost before the repair person comes out. Many companies charge a fee just to diagnose the problem, which gets credited toward repairs if you use them to fix it.
Stay Cool While You Wait
While waiting for repair service, take steps to stay safe and comfortable in the heat. Drink lots of water throughout the day, even if you don’t feel thirsty. Avoid drinking too much caffeine or alcohol, as both make your body lose water faster. Keep cold drinks in the fridge and eat light meals instead of heavy foods that make your body work harder to digest.
Spend time in the coolest areas of your home, usually lower levels or interior rooms without direct sunlight. Take cool baths or showers to lower your body temperature. Wear light, loose clothing made from natural fabrics like cotton that let your skin breathe. If you have elderly family members or young children at home, check on them often and help them stay cool.
Consider Temporary Solutions
If the wait is long and temperatures are extreme, look into temporary options like sleeping at a friend’s house, visiting a public place with AC during the day, or getting a portable AC unit. Some people rent window AC units when their main system breaks. These temporary fixes cost money but might be worth it during a dangerous heat wave.
Once your AC is fixed, keep it running smoothly by replacing filters every three months and having a professional inspection once a year. Regular upkeep helps you avoid future breakdowns.
