Air Conditioner Keeps Running When Turned Off? | Possible Causes

Why Does My Air Conditioner Keep Running When Turned Off?

Every single year, millions of AC units around the world are working hard to keep people comfortable. However, just about all systems out there, complications and problems can happen at some point. As these air conditioners work tirelessly to bring you cooling comfort, systems issues are a reality of life.



Is your air conditioner still running when turned off? If so, you’re experiencing a very common AC problem. Luckily, finding a solution can be simple. Keep reading to learn why your air conditioner keeps running when turned off, including some troubleshooting tips that can stop the problem for good.

AC keeps running? Check these common reasons

Several different things can cause your air conditioner to run continuously. Let’s take a look at some of the most common reasons:

Excessive heat

If your area is experiencing a heatwave and the temperatures are scorching, this can wreak havoc on your system. A properly working thermostat will have a set temperature and power your AC unit on when that temperature isn’t being met. If your AC unit is constantly trying to keep up with the demand, it may run for long periods of time. If this keeps happening in your home, try to find ways to lower the indoor temperature.

If you leave blinds open throughout the day, close them when the outdoor temperatures are high. This can take some stress away from your air conditioner. Another tip is to invest in some blackout curtains. While these work to block out all sunlight, they can do wonders for your AC unit’s performance. Not only can this result in a properly working AC system, but it can also lower your energy bills.

Faulty Thermostat

Since a thermostat regulates temperature and acts as an operator for your cooling system, a faulty thermostat can lead to an air conditioner still running when turned off. If your thermostat is broken or damaged, you’ll want to have it fixed immediately. Luckily, making a repair or buying a replacement is relatively cost-effective.

Wiring issues

From your thermostat to your outdoor unit, your entire air conditioning system is connected by a series of wires. Due to a variety of reasons, wires can easily get damaged or disconnected at some point. If your air conditioner keeps running when turned off, this could be the root of the problem. However, as messing with these wires can cause an electrical shock, you should always contact a professional HVAC technician. They know what to look for and can keep everyone safe.

Finding a solution

If your air conditioner keeps running when turned off, you might be pretty frustrated. And if the problem happens in the middle of the summer, finding a quick solution is essential. Here are some tips for troubleshooting the AC issue right away:

Always schedule routine maintenance

To treat the issue and prevent it from happening in the first place, it’s vital to schedule AC maintenance at least once a year. A professional technician can take a look at your system components, run some tests, and ensure everything is in working order. If you avoid this service, your system may work harder than it should.

Examine the thermostat

To find a fast solution, make sure the thermostat is working correctly. Check the settings, clock, screen display, and run some tests on it. Also, you should check the batteries. If they’re old or worn out, replace them right away. If needed, you could also have a professional check the wiring within the thermostat.

Inspect the air ducts

You can run into some serious complications if you have a leak in your system’s ductwork. These ducts are found throughout your home, bringing cool air to the different rooms in your residence. Over time, a leak can happen. If that’s the case, it can cause your AC unit to work harder than it should, thus leading to an air conditioner that keeps running. While inspecting your ducts can be challenging, call a professional HVAC technician for assistance.