Nina Smith

Nina Smith

Nina is a writer with more than 5 years of experience. She is experienced in such topics as home warranty and home maintenance. She enjoys giving a piece of helpful advice, so don't hesitate to ask her in the comments.

ac line is frozen

The freezing of AC is a very common problem. It can be very frustrating because you don’t know what to do when your ac unit freezes up. AC units are expensive to repair, and if you don’t get them fixed right away, your house can get really hot and uncomfortable.

The best way to prevent the freezing of AC is not to keep it running for long hours and also avoid leaving home with the window open.

If you are facing this issue, then we have some easy fixes that will help you in getting rid of this problem easily – Here’s how we recommend dealing with frozen ac line before it becomes a big problem for your household.

How To Fix Ac Frozen Lines?

There are a number of ways to fix frozen air conditioning lines. We will explain 8 common issues that are causing the problem of frozen ac and their fix.

Refrigerant is Leaking: 

If you are suffering from an AC line frozen problem, it could mean the refrigerant is leaking. The reason for this leak can be many like loss of pressure, bad valve or a bad compressor. If your AC unit turns off suddenly, you should check the refrigerant level in your air conditioner right away.

The refrigerant should be around 30 pounds per square inch. Refrigerant is an important part of your air conditioning machine, and if it leaks out, your cooling system will stop working.

Bad or Dirty Filter:

If your air conditioning unit is dirty, then you have to clean it. Clean the fan and coils thoroughly to remove any dust particles that can be causing the problem of freezing ac. 

If your filter is dirty, then it’s time to clean it or replace it entirely. You don’t want dirt and debris clogging up your AC so that it’s not working properly or at all. 

Adjust Valve:

The pressure can drop in your air conditioner due to factors like a dirty filter or unclean coils. If you notice that your air conditioner is not cooling as quickly as it used to, you should also check your valves. You can change the valve yourself, or your ac repair service providers can also do it for you if the valve is not working.

Loose or Dirty Ducts:

Your air conditioning lines can get frozen if the ducts are loose or if they have dust in them. Make sure that your ducts are not damaged and are firmly secured in place.

The air that cools your home comes through the ducts, and if they are not working properly, it can cause ice formation.

Line break:

If your AC line freezes up, it can be a sign of bigger problems. It can mean that there is a break in the line or a problem with your refrigeration unit. 

You should get your line checked immediately by a professional to avoid bigger problems.

Faulty Thermostat

If the thermostat stops working, the air conditioning unit will keep running. Your home will get too cold, or your AC may freeze up. A thermostat controls the temperature in your house, and if it stops working, it can cause issues. You should change or fix the broken thermostat to avoid further problems.


The cooling of your ac unit can get disrupted due to a problem with the fuse. You can replace the fuse yourself as it is not expensive. You just have to make sure that the fuse you are buying is of the right size for your air conditioner.

Unclean Evaporator Coil:

If you have noticed ice formation in your evaporator coil, then it is a clear sign that the coil needs cleaning. Your ac unit can get frozen if you don’t clean the evaporator coil regularly.

If your air conditioning lines have frozen, then there are chances that your air conditioner has some internal damage as well. 

If you have tried all these tips, but none of them worked, then it’s time to call a professional ac repair service provider. They will be able to fix the problem of frozen AC for you right away.

Tips For Preventing Your AC Lines Frozen Issue

1. Change the filter regularly: Cleaning the air conditioner filter can help keep the refrigerant running free.

2. Check for leaks: The refrigerant may gradually leak if your AC is running for a long time. This can decrease the pressure, and your cooling system will get stuck.

3. Check for low refrigerant: If your refrigerant is low, then the pressure may also decrease, and it can lead to freezing of AC. You just have to empty the old refrigerant and refill it with a new one.

4. Don’t block the air vents on your AC unit. If you are using a window air conditioner, then make sure that it is in an area with good ventilation.


We hope this article was helpful and solved the problem of frozen AC for you. If you have any questions regarding the topic & want to share your experience, please leave a comment below.

Thanks for reading!

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