Why Is My AC Running but Not Cooling? 4 Likely Reasons

By August 28, 2020Blog
why is my ac running but not cooling

It’s the hottest season of the year, and all you need is some cool temperature passing through your skin. But that’s not happening because of one main reason; the central air conditioner not cooling. Now you have to deal with the heat and sweat through sleepless nights.

But why is my AC running but not cooling? That’s probably the question in your mind. Everything is running as it should, but you’re not getting that cool breeze everyone else is yawning for during summer. It’s natural to get worked up.

But don’t worry because we might have the answers you need. There are many reasons why your AC does not cool. This article covers all that and what you should do about it.

1. Why Is My AC Running But Not Cooling? The Air Filter Is Dirty

One of the reasons your AC is not cooling may be because the air filter is dirty. The air filter catches all kinds of dust, dirt, and all particles through the handler unit. All these particles go inside the system cleaner.

The whole process ensures you get a clean supply of air around your home, and the system operates efficiently.

But this won’t happen if the air filter collects too much dust particles and becomes too dirty to work efficiently. Instead of carrying out its intended purpose, a dirty air filter will only block the airflow and reduce your home’s cooling.

The thermostat might continue reading as usual, but you will not receive enough air inside your home.

In extreme cases, the dirty filter might freeze your evaporator coil into a block of ice, which blocks the cool air from passing. If you don’t handle this on time, the system might shut down completely.

But a dirty air filter should not be the end of your AC unit because this is a problem you can comfortably control. You should always ensure you check and replace your filter and do a replacement before it starts showing signs of trouble.

When you properly maintain your air filter, but the problem persists, a dirty air filter may not be the problem. This means you need to dig deeper into the problem.

2. Incorrect Thermostat Setting

Have you checked the thermostat setting? This is the first thing you should do before you ask why my ac is not cooling.

When your thermostat is set to ‘on,’ you will notice that the AC will blow cool and lukewarm air while turning on and off. When it’s on, it will run day and night even when the temperature is not too hot.

But this is a problem that will take only a few seconds to solve. The first thing to do is to try setting the thermostat to auto.

If this doesn’t work, proceed to the next step and check is the thermostat is set to cool. Also, find out whether the temperature setting is still correct.

If you find that your thermostat was off, you can set it on and set it to heat before switching it back to cooling operation. Give it a few minutes to catch up then confirm if it’s back to ensure you get the benefit of air conditioning in your home or office.

3. Refrigerant Issues

For the cooling process to work correctly, the refrigerant chemical must be in place and the right amount. But this is not the case often because it is also bound to fail you one time, causing your AC not to cool.

One problem that you may have with the refrigerant is when it leaks through the outdoor coil or the indoor system. It will then turn from liquid to gas and draw heat energy humidity indoors and release it outside.

When this happens, it may be one of the reasons your AC system is not working correctly. The issue may even cause a permanent system failure.

Unlike other AC system problems that you can troubleshoot, a refrigerant leak is not a problem you can solve yourself. You need to contact a professional to check the cause of the problem and make a proper diagnosis. But before your repairman arrives, ensure you don’t leave the AC on as this can damage the compressor.

4. You Have Small Air Conditioner

Not all those problems are caused by technical hitches. Sometimes your air conditioner may be too small that it doesn’t supply enough cool air to the building. Each conditioner comes sized to provide a certain cooling amount measured in British Thermal Units per hour (BTUh)

When the temperature is not too hot yet, you might not notice that your AC is not providing the required amount of cool air. But when it becomes unbearably hot, you AC might have a hard time cooling the house, and that’s when you notice it’s not the right size.

Well, determining if you have the right unit for your home is not easy. This is because there are other factors involved, such as construction quality, square footage, insulation quality, local climate, etc. You might consider working with a professional to help you understand if it’s the right size for your home.

If you find out that your air conditioning system is undersized and you don’t have the means to change it, there might be some alternatives to keep you going. Think of adding ductless units in the hot areas as you wait to get the right size.

Let a Professional Do the Work

There you have it. Those are some reasons answering why is my AC running but not cooling and what you can do about it. These are some troubleshooting tips that you can do at home to solve the cooling issues.

However, if all these don’t work or your system has much bigger problems, you must consider working with a professional to avoid further damage.

Guy’s Air Conditioning and Heating are ready to be at your service with the best solutions to your AC problems. Just give us a call, and we will be at your service any time day or night.