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Why Does Your AC Freeze?

A frozen AC in the middle of a Texas summer? We know — it sounds impossible. But frozen air conditioners are actually a pretty common occurrence, and they happen more the hotter it gets. Before you call us crazy, the HVAC experts from Service Wizard are here to explain why AC systems freeze and tell you exactly what to do if you find ice on yours.

Why Do Air Conditioners Freeze?

Although ice in the middle of summer seems to defy science, it’s actually pretty simple. Your AC’s coils contain refrigerant that absorbs heat from inside and deposits it outside, cooling the air in your home. During this process, the change of temperature pulls moisture out of the air and forms condensation on the coils that drips off into the drain pan. 

When dust, dirt and other debris gather on the coils, the condensation sticks to the debris rather than dripping away. The water that collects then slows the heat transfer between the air and the coils, causing the refrigerant to get colder and colder. This causes the water to freeze, which completely blocks the cooling process. When your AC is frozen, you’ll feel that your AC is blowing warm air as a result.

Preventing a Frozen AC

Because frozen air conditioners are a pretty common problem, you may be wondering if there’s anything you can do to keep your AC from freezing. The best way to prevent this problem is by regularly changing your air filter. While it’s an easily forgettable task, changing your air filter every one to three months will help keep dust out of your HVAC system and prevent debris buildup.

How to Fix a Frozen AC

If you find ice on your AC, don’t panic — it’s easy to fix the problem on your own with a little patience! Follow these steps to thaw your frozen air conditioner:

  • Immediately go to your thermostat and change the setting to OFF.
  • Change the fan setting to ON. This will circulate warm air through the HVAC system and thaw the ice faster.
  • Wait for the ice to melt. This could take a few hours or even most of the day, so consider going to the pool, seeing a movie or even visiting a friend to avoid sitting in a hot, uncomfortable house.
  • Once all of the ice is melted and the coils are completely dry, you can turn your thermostat to COOL and your fan to AUTO.

Once you’ve completed these steps, you should notice the change of temperature within the hour. Periodically hold your hand to a vent to feel for cool air if you’re unsure.

AC Freezing Up? Call a Professional

Fixing a frozen air conditioner isn’t an easy DIY task, but it’s not something you should have to do more than once. If your AC keeps freezing up, there’s probably a more serious problem with the system, such as a refrigerant leak. Call a professional HVAC company like Service Wizard for AC repairs if your AC freezes more than once or twice.

Contact us online or by phone for more information or to schedule your air conditioner repairs today!

Why Choose Service Wizard?

Professional Team
Professional Team
Our customers mean the world to us. That's why our team holds ourselves to the highest standards of behavior and service!
Reliable Service
Reliable Service
You can count on our team to provide dependable services. When you need us, we always show up.
Flexible Financing Options
Flexible Financing
We believe in focusing on the comfort of you and your family, so we offer financing options with approved credit for your convenience.

What Our Customers Say

Earned My Loyalty

My technician, David, showed up promptly, was very courteous, wore a mask, and did a great job. He also talked me through how I could maintain and clear the drain line clean myself going forward. Service Wizard has earned my loyalty for future service calls!

Jordan C.

Very Knowledgable

We have been customers of Service Wizard for long time. They installed our new more energy-efficient units several years ago and continue to provide service to us. They are pros! The service techs are very knowledgeable and great to interact with. They take the time to explain the service. Great company to do new installs and service the units!!! Very pleased.
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Service Wizard has been taking care of our old HVAC system for years. We especially appreciate Emilio for his care and expertise and willingness to answer our many questions!

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