Why Are My AC Coils Frozen? – Complete Guide 2022


why are my ac coils frozen

Are you asking yourself the same question – “Why are my AC coils frozen?”. If so, you are not alone. Read the article below to find out all about it.

When it’s hot outside, the last thing you want is for your AC system to go out. When it comes to our homes, none of us want anything to go wrong. We work hard to keep everything in order and when something does happen, it can be a real hassle.

Recently, I had an issue with my AC coil and I wanted to share what happened in the hopes that it might help someone else out there who is dealing with the same thing. Unfortunately, if you’re finding that your coils are frozen, it might be time to call in a technician. Here’s a look at some of the possible reasons why your coils might be frozen, and what you can do about it. Keep reading for more information on my experience!

How Do You Know If Your AC Coils Are Frozen?

If your air conditioner’s coils are frozen, you may notice the following symptoms:

  • The air conditioner is not blowing cold air
  • There is ice or frost on the outside of the unit
  • The air conditioner is running, but not cooling the house
  • The air conditioner’s coils are covered in ice or frost. If this happens, turn off the air conditioner and call a professional for help. If left on, the ice can damage the coils and cause expensive repairs.

Why Are My AC Coils Frozen – Top 10 Reasons

These are just a few of the most common causes of frozen AC coils. If you suspect that your coils are frozen, it’s important to have them checked out by a professional as soon as possible. Frozen coils can damage the AC unit and lead to a variety of other problems, so it’s best to nip the problem in the bud before it gets worse.

1. Malfunctioning Air Conditioner

One of the most common causes of frozen AC coils is a malfunctioning air conditioner. If your AC isn’t working properly, it can cause the coils to freeze over. There are a few different ways to tell if your AC is malfunctioning:

  • If the air coming out of the vents isn’t as cold as it should be, this is a sign that the AC unit isn’t working properly.
  • If you hear strange noises coming from the AC unit, this could be another sign that something is wrong.
  • If you see water leaking from the AC unit, this could be a sign that the coils are frozen and need to be thawed out.

2. Dirty Air Filter

Another common cause of frozen AC coils is a dirty air filter. If the air filter is clogged, it can restrict airflow to the coils and cause them to freeze over. A dirty air filter can also make the AC unit work harder than it needs to, which can lead to other problems.

3. Low Refrigerant

If the refrigerant level in the AC unit is low, it can cause the coils to freeze over. Low refrigerant can be caused by a leak in the system, or by simply not having enough refrigerant in the first place.

4. Outdoor Temperature

In some cases, the outdoor temperature can cause the AC coils to freeze over. If it’s too cold outside, the coils may not be able to properly dissipate the heat, which can cause them to freeze.

5. Improper Installation

If the AC unit wasn’t installed properly, it can lead to a number of problems, including frozen coils. Improper installation can cause the AC unit to work harder than it should, which can lead to a variety of other issues.

6. Poor Maintenance Of The Air Conditioner

If the AC unit isn’t properly maintained, it can also lead to frozen coils. Poor maintenance can cause the AC unit to work harder than it should, which can lead to several other problems.

7. Clogged Evaporator Coils

The evaporator coils are responsible for absorbing heat from the air inside your home. If the coils are clogged, they can’t do their job properly, which can cause the coils to freeze over.

8. Restricted Airflow

If there’s restricted airflow to the AC unit, it can cause the coils to freeze over. There are a few different things that can cause restricted airflow:

  • A dirty air filter
  • Clogged vents
  • An oversized AC unit

9. Thermostat Problems

If there’s a problem with the thermostat, it can cause the AC coils to freeze over. There are a few different things that can cause thermostat problems:

  • The thermostat could be set to a temperature that’s too low, causing the Air Conditioning unit to run for too long and freeze the coils.
  • The thermostat could be dirty or covered in debris, which can prevent it from working properly.
  • There could be a problem with the wiring, which can cause the thermostat to malfunction.

If you think that the thermostat might be causing the problem, you should try cleaning it or checking the wiring. You can also try setting the temperature to a higher setting to see if that prevents the coils from freezing over.

10. Ductwork Issues

One of the main reasons your AC coils freeze is because of ductwork issues. If there are any leaks or holes in your ductwork, cold air can escape and cause the temperature around the coils to drop, which leads to freezing. You should have your ductwork inspected and repaired by a professional if you suspect this is the problem.

How To Fix Frozen AC Coils Problem

If you notice that your AC coils are frozen, there are a few things that you can do in order to fix the problem. First, you will want to turn off your AC unit and then locate the coils. Once you have found the coils, you will want to thaw them out by using a hairdryer or a heat lamp.

You will also want to make sure that you remove any debris that may be blocking the airflow to the coils. After you have thawed out the coils and removed any debris, you should be able to turn your AC unit back on and enjoy cool air once again. If the problem persists, you may need to call a professional AC technician for further diagnosis and repair.

Tips To Prevent AC Coils From Freezing

  1. Check the air filter and clean or replace it if necessary. A dirty air filter restricts airflow and can cause the AC coils to freeze.
  2. Make sure the thermostat is set to “cool” and the temperature is set below the room temperature.
  3. Adjust the humidifier settings to maintain proper humidity levels. Too much humidity can cause condensation on the AC coils, which can lead to freezing.
  4. Inspect the ductwork for leaks and seal any gaps or holes. Leaky ductwork can reduce airflow and cause the AC coils to freeze.
  5. Schedule regular maintenance appointments with a qualified HVAC technician. They can clean the AC coils and check for other potential problems.

FAQs – Why Are My AC Coils Frozen?

What Causes AC Coils To Freeze Up?

One of the most common reasons that AC coils freeze up is because of a lack of maintenance. When the coils are not cleaned on a regular basis, they can collect dirt and debris that can block airflow and cause the coils to freeze up.

Another reason AC coils may freeze up is because of a problem with the air filter. If the air filter is dirty or clogged, it can restrict airflow to the coils and cause them to freeze up. Finally, AC coils can freeze up if the refrigerant level is low. When the refrigerant level is low, the coils can’t absorb enough heat from the air, causing them to freeze up.

How Do You Unfreeze AC Coils?

There are a few ways to unfreeze AC coils. One way is to use a hairdryer on the low setting and direct it at the coils for a few minutes. Another way is to use a can of compressed air and spray the coils. Finally, you can thaw the coils with warm water. Whichever method you choose, be sure to turn off the power to the AC unit before you begin.

Will Frozen AC Fix Itself?

It’s unlikely that a frozen AC will fix itself, and it could actually end up causing more damage to your unit. If you notice your AC isn’t working properly, it’s best to contact a professional for help. Trying to fix the issue yourself could void your warranty, and cause further damage.

Can You Pour Hot Water On A Frozen AC Unit?

You can pour hot water on a frozen AC unit, but you need to be careful. Hot water can damage the unit and cause it to leak. Make sure you know what you’re doing before you attempt this.

How Long Does It Take For AC To Unfreeze?

It can take up to 24 hours for your AC to unfreeze. In the meantime, you can try using a hairdryer to thaw out your AC unit. Be sure not to use too much heat, as this could damage your unit. You can also try using a fan to help circulate air and speed up the thawing process. If your AC is still frozen after 24 hours, then you may need to call a professional for assistance.

Can Your AC Freeze In The Summer?

The answer to this question is a little bit complicated. While it is technically possible for your AC unit to freeze in the summer, it is very unlikely. The most common reason why an AC unit would freeze is if the air conditioner is not properly maintained.

If the coils are dirty or the Freon level is low, then it can cause the unit to freeze. However, if you keep your AC unit well-maintained, then it is very unlikely that it will freeze in the summer.


Frozen AC coils are one of the most common issues we see in the summer. If your AC coils are frozen, it means that your air conditioner is not able to properly circulate air. This can lead to several problems, including reduced efficiency and increased utility bills.

In some cases, frozen AC coils can even cause your air conditioner to shut down completely. If you are facing the same issue, you should definitely read our blog above on the possible causes of freeze and how you can fix it.

We hope you found this article on “Why Are My AC Coils Frozen?” helpful. If you have any questions or need assistance with your AC unit, don’t hesitate to call us. If you have any questions or would like more information, please don’t hesitate to reach out to us. Our team is always happy to help our customers keep their homes cool and comfortable all summer long!

Thanks for reading!

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