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10 Reasons Why Your AC is Blowing Warm Air

10 Reasons Why Your AC is Blowing Warm Air

If you’re experiencing warm air from your AC instead of the refreshing cool air you expect, you’re not alone. There are many reasons why your AC may be blowing warm air, and trying to diagnose the problem can be frustrating. 

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In this article, our experts will explore 10 possible reasons why your AC is blowing warm air and provide you with some practical solutions to help you stay cool and comfortable in your home. As a homeowner, understanding the root cause of your AC problem is essential to ensure you can enjoy the cool air you deserve

10 Reasons Why Your AC Blowing Warm Air

Determining exactly why your AC is blowing warm air can be challenging. This is because there are many different reasons why this may be the case. Each one has different signs to look out for. They also have different solutions.

1. Low Refrigerant

The most obvious and common reason an AC unit blows warm air is due to low refrigerant. Refrigerant is necessary for an AC unit to run correctly. As the name implies, creating refrigerated air from the AC is vital. It does this by absorbing humidity and heat from the air, which leaves the air feeling cold. 

Unfortunately, this is a problem that requires the assistance of a professional. This is because the problem has many potential causes. A leak may need to be fixed, the refrigerant may need to be replaced, or the unit itself may have a fatal flaw that is creating the problem. In any of these situations, booking a professional will fix the issue. 

2. Clogged Air Filters

Dirty Air Filter

Another common cause of AC problems comes from the filters. These filters prevent debris and other materials from making their way into the air conditioning system. However, they can get clogged with this very same debris and material. 

When the airflow through your system is reduced, your AC unit will have to work harder and less efficiently. As a result, the air never cools down enough, and you end up with warm air blowing through the vents. Fortunately, fixing this issue is relatively easy. In most cases, you must replace the old air filter with a new one, which you can typically do on your own. 

Just remember to change your air filter regularly to prevent this issue from happening again. Most systems require a new filter every one to three months, but it’s best to check your user manual for the recommended replacement interval for your specific unit.

3. Wrong Thermostat Setting

One of the most common reasons an AC blows warm air is due to a simple human error. Often, people believe that they have set the system to cool the room, but in reality, they have not. While it may seem like a small mistake, it can lead to confusion and frustration when the air coming from the vents remains warm.

This is another issue that is easy to fix. Simply take a look at the thermostat and see what it says. To keep the place cool, it should be set to “cool” rather than “warm” or “fan.” In addition, the temperature should be set low enough to make a difference. If this isn’t the case, pressing a few buttons should quickly resolve the problem. 

4. Frozen Evaporator Coils

Frozen Evaporator Coil

Sometimes, parts of an air conditioning system get a little too cold. Specifically, the evaporator coils fall victim to this problem. When they don’t receive proper airflow, air will build up around them, making them less effective. If this happens, the coils will fail to make the air cool as they should. 

An AC check-up will often catch issues like this before they have a chance to worsen. They can also fix the issue overall. 

5. Outside Unit Has Lost Power

In some cases, an air conditioner’s inability to produce cold air isn’t the air conditioner’s fault. Instead, it is a failure in another system. 

When the outside unit of an AC system loses power, it stops cooling the air, while the interior system continues to blow air around, mistakenly thinking that it is being cooled by the outside unit. 

This can be easy to overlook, mainly if the power loss is localized to the outdoor unit. In such cases, you may still have power inside while the outside unit remains without power. As a result, a power outage may not be the first thing that comes to mind when troubleshooting the issue.

6. Duct Leaks

Damaged Air Ducts

Sometimes, your AC unit will blow warm air even though the unit itself is working fine. This is the result of something wrong taking place down the line. 

Duct leaks will prevent the cold air from your AC unit from staying cold. The leak will let warm air mix into the vents and even let cold air escape. This makes the entire process ineffective. 

7. Return Vents Closed or Blocked

Another simple problem that can go overlooked deals with the air conditioning system’s return vents. These are commonly blocked when people close them for whatever reason. They are also commonly blocked when furniture, boxes, or anything else is piled up in front of them. If this happens, the airflow into the system will be reduced, and the system will run poorly. 

Like most other simple problems, this one has a simple solution. All you have to do to restore your AC’s effectiveness is remove the obstruction. Open the vents back up and make sure they are clear. Before you know it, you’ll have cool air again!

8. Malfunctioning Compressor

Pieces of any AC system are prone to malfunction. It will not work right if something goes wrong with the system’s compressor. The system will be unable to work with the refrigerant properly and, thus, will not adequately cool the air. 

This is another problem that requires a more serious solution. To fix a compressor, you will usually have to reach out to professionals for AC repairs to ensure the job is done right. 

9. Circuit Breaker

 Circuit Breaker

Air conditioning systems consume a significant amount of power, making them more likely to trip the circuit breaker in your home. If this occurs, the power needed to cool the air is no longer available, causing the AC to fail to cool the air as intended.

Check to see that the unit still has power. If it doesn’t, check the circuit breaker. You may need to flip it back in place or even replace a blown fuse. 

10. Clogged Drains

Although it may not be immediately apparent, air conditioners and drains are directly linked. AC systems require drains to remove the excess water that they produce during operation. If the drain becomes clogged, the excess water has nowhere to go and will remain inside the air conditioner, leading to potential problems. Depending on the severity of the issue, this may cause the system to operate inefficiently or even break down completely.

Call Hutchinson Experts to Fix Your Air Conditioner in New Jersey

If your home AC is blowing warm air and you want it fixed right, you can trust the experts at Hutchinson to help. We will diagnose your problem and then immediately get to work on it. We even offer service plans that will keep your air conditioning running at all times. Rest assured that if you choose to work with us, problems with your AC are unlikely to arise anytime soon.