My AC Just Quit: A Step-by-Step Guide for Homeowners in a Heatwave

Your air conditioner stops working on a 95-degree afternoon. The house starts warming up fast, and it’s hard to know whether to panic or just wait it out. Before you do either, there are a few simple things worth checking. Some AC shutdowns have straightforward causes that you can address in a few minutes. Others need a professional. This guide walks you through both so you can figure out where you stand and what to do next.

Before You Call Anyone: 4 Simple Checks

When an AC stops working, it’s tempting to assume the worst. But a handful of common AC problems could be at fault. Luckily, these are easy to rule out on your own, and doing so saves time whether the fix is simple or you end up needing a technician.

1. Check the Thermostat First

Start here before anything else. Make sure the thermostat is set to “cool” and not “fan only” or “heat.” If the display is dim or blank, the batteries may need replacing. Set the temperature at least five degrees below the current room temperature and give the system a few minutes to respond. A surprising number of service calls start and end at the thermostat.

2. Check the Circuit Breaker

Head to your electrical panel and look for a tripped breaker. A tripped breaker will sit between the “on” and “off” positions rather than fully in either direction. Switch it fully off, then back on. If it trips again immediately, don’t reset it a second time. That’s a signal something else is going on, and it’s time to call a professional.

3. Check the Air Filter

A severely clogged filter can restrict airflow to the point where the system overheats and shuts itself off as a safety measure. Pull the filter out and take a look. If it’s visibly packed with dust and debris, change your filter, then give the system 30 minutes before trying to restart it. This allows components that may have overheated to cool down before you run the system again.

4. Check the Outdoor Unit

Go outside and check whether the outdoor condenser unit is running. If the fan isn’t spinning or there’s no sign of operation, the unit may have shut off due to overheating or a separate electrical issue. Check that nothing is blocking airflow around it, like overgrown shrubs or debris that has built up against the unit. Don’t attempt to open the unit or work on internal components.

When It’s Time to Call a Pro

If you’ve worked through the steps above and the system still isn’t running, the issue is beyond what you can address without tools and training. A few situations in particular call for a technician right away.

• The breaker trips again as soon as you reset it.
• The outdoor unit isn’t running and there’s no obvious explanation.
• You notice ice on the refrigerant lines or on the unit itself.
• There’s a burning smell or unusual sounds coming from the system.
• The system turns on but blows warm air despite a correctly set thermostat.

These are signs of refrigerant issues, electrical failures, compressor problems, or other mechanical issues that require professional diagnosis. Running a system that has one of these problems can cause further damage, so it’s better to shut it off and make the call.

What to Do While You Wait for a Technician

Once you’ve scheduled service, there are a few things you can do to keep your home more bearable in the meantime. Close blinds and curtains on south- and west-facing windows to block direct sun. Use fans to keep air circulating. Avoid using the oven or other heat-producing appliances. If you have vulnerable household members, such as young children, elderly relatives, or pets, prioritize getting them to a cooler environment while you wait.

Call Barber Heating & Air for Emergency AC Repair

Barber Heating & Air provides emergency AC repair for homeowners across North Carolina who need fast, reliable service when their system goes down. Our technicians diagnose the problem accurately and explain what they find before any work begins, so you know exactly what you’re dealing with and what it’ll take to fix it.

If your AC stopped working and the basic checks haven’t resolved it, give us a call. We’ll get your system back on track as quickly as possible.