My Air Conditioner Froze Up


It’s a bizarre sight, but not uncommon. On a sweltering Corpus Christi Day when the sun is shining, you find that your outside air conditioner is covered in ICE! 

What should you do when you have a frozen air conditioner? 

Calling Tiger Heating & Air is to come out and fix your AC will get you back up and running, but there are a few DIY steps you can try yourself. There may be a relatively simple problem causing your air conditioner to freeze up, and one you might be able to repair quickly and cheaply! 

We will go over the most likely reasons why ice develops on an air conditioner. Some have troubleshooting steps that many homeowners can try to tackle on their own. Other causes are best left to trained HVAC repair technicians who can accurately diagnose the problem and successfully resolve it. 


No matter how your air conditioner froze up, there is an basic – yet critical – step you must do first. You need to get your AC unit thawed. And that starts at your thermostat. 

It is turning the thermostat to OFF. And then turn the fan ON. This will start the defrosting process. 

dont remove ice by hand - My Air Conditioner Froze Up

If it’s a hot day, your AC could be fully thawed in just a couple of hours.  

If the conditioned air is cool and the unit doesn’t freeze up again, you are good to go. If it does freeze up again, turn the air conditioner back OFF and the fan set to ON. Then you will need to call an experienced AC repair technician, like our fabulous HVAC team at Tiger, as you’ve got a bigger problem on your hand.  


1. Dirty Air Filter 

Very dirty air filter that caused an AC unit to freeze up with ice

The most likely cause of a frozen air conditioner coil is not enough air flowing over the evaporator coils. The air that flows over your coils loses its heat to the coils, but if not enough air is flowing, the refrigerant gets too cold and might cause the coils to freeze.  

The leading reading why the airflow could be hampered is that your air filter is dirty. A dirty filter can block or clog airflow and is a common cause for an air conditioning unit to freeze up. 

While the AC unit is thawing out, check the air filter on your furnace. If it’s dark and dirty, replace it even if it’s not on schedule to be replaced yet. Many homeowners do not change their filters as frequently as they should.  

Once your air filter is replaced and the AC unit is thawed out, you should try to turn the AC back on at the thermostat and see if it works now. 

2. Blocked (or closed) return ducts 

There is a common misconception that you should close any vents that you don’t need to save on energy use and cost. That is not the case. The ductwork in your home, including the vents, was designed to work as a system. Closing off too much of this system can cause it not to work correctly. It may be okay to have a few vents closed, but this can cause problems, including a frozen AC unit if you have too many. 

Are any vents in your home closed or obstructed? Check the vents in your home to make sure they are open and not blocked. Move aside any items, including furniture or curtains, covering or blocking the vents.  

3. Low Refrigerant Levels 

Being low on refrigerant (freon) is the main reason why air conditioners freeze up. Often that indicates there is a leak in your system. This is a potentially dangerous problem and should be resolved only by a trained AC technician. 

Call Tiger Heating & Air for 24/7 emergency repair in Corpus Christi, TX

4. Dirty evaporator coils 

Dirty evaporator coils are another problem that can cause an air conditioner to freeze.  

If there is any buildup on these coils, they won’t be able to absorb the heat it needs to produce cool air for your home. If the filter is clean, and you still have poor airflow, it is likely being caused by a dirty coil. 

Performing annual maintenance on your system should keep this problem from happening. Tiger Heating & Air provides professional AC maintenance and tune-up service. Call us at 361-852-4450 to get a technician scheduled. 

5. Mechanical Failures 

Various mechanical problems can cause an outdoor unit to freeze. An HVAC system involves a lot of components. Perhaps there is a kink in a refrigerant line, or the blower fan is not working. These sorts of mechanical failures can cause the pressure to change in your system and make your air conditioner freeze up. 

Another problem that can cause ice to form on your air conditioner is a broken or malfunctioning blower motor. This part inside your AC makes sure that the fan blows return air over the evaporator coils. If not enough air moves over the coils, your air conditioner will get too cold and freeze up. 

6. Temperature is Cold Outside 

Did you leave your thermostat on COOL during a cold snap? If you are running your AC when the outside temperature dips into the 50s or below, the pressure inside of your system will drop. That is enough to cause a freeze-up of your air conditioner. 

Tiger AC repair technician in Corpus Christi


If one of the above problems was something you can tackle and fixed your frozen AC, that’s great! However, you are not out of the woods yet. You want to make sure that your air conditioning system doesn’t refreeze. Give it time, and make sure your system remains ice-free. If it freezes up again, that means that whatever troubleshooting step you did was not enough to fix the problem completely. You will need to call for a professional AC repair.  

Tiger Heating & Air is trained and experienced to service any type or model of air conditioner or cooling system. We provide 24/7 service to the entire Corpus Christi area and can be trusted to provide you with friendly, quality service at a fair price. Call on us to fix any AC problem! You can read reviews from people across Corpus Christi on why they say you can’t go wrong with Tiger! 

Call Tiger at (361) 852-4450 and let us how we can help you today! 

How to Stay Cool During a Heat Wave

Important Tips to Be Safe & Comfortable in a Hot Corpus Christi Summer

heat wave

We know how a Corpus Christi summer can be a scorcher, and it’s difficult to keep cool throughout the hottest months. Here are some ways to stay cool during these hot days from the Corpus Christi cooling experts at Tiger Heating & Air.

This post is for homeowners who are looking for ways to stay cool during a heatwave. We’ll cover topics like how to keep your house cooler, what clothes you should wear and even suggestions on what to eat. 

8 Steps to Stay Cool

  1. Drink water: Dehydration can make you feel worse in the heat. So drink lots of water!
  2. Wear light clothing: Light colors will reflect heat away from your body and dark colors absorb it instead. Keep the fabrics thin or loose for maximum breathability as well.
  3. Stay out of direct sunlight, especially during the peak hours between 10am to 4pm. If you must be outside, wear a hat, sunglasses, and sunscreen to protect yourself from the sun’s rays.
  4. Set your thermostat temperature to between 74 – 78 degrees when you’re home and awake. Then set it to be just up a couple degrees when you’re sleeping. Program the temperature to raise to about 86 during the hours no one is home.
  5. Keep your home as cool as possible with window shades and fans to circulate air. While it might seem like an energy-saving tool to shut vents to rooms not in great use, be careful not to shut too many. Your home’s entire cooling system was designed to work with the vents open and shutting too many could disrupt the airflow and even damage your home’s air conditioning units.
  6. Eat cold foods and drink cold drinks (especially water – see tip #1). Cold food and beverages can help cool down your body.
  7. Avoid caffeine and alcohol which can dehydrate you.
  8. Take a cool shower or bath. It’s become trendy to take cold showers, as people claim it helps your mental and physical health. A hot Texas summer may be the perfect time to try out cold showers yourself!

We hope this article has been helpful in providing you with some tips and tricks to stay cool during a heatwave. If your AC breaks down, don’t panic! You can call Tiger Heating & Air for emergency AC repair service 24 hours a day, 7 days a week.

Tiger Heating & Air has 24/7 emergency AC repair service in Corpus Christi, TX

Remember to schedule your annual AC maintenance checks early in the year before it turns hot. It will save both time and money by preventing a later AC repair emergency.

Broken AC? Call on Tiger for Repair

Owner of Tiger Heating & Air in Corpus CHristi driving hvac vehicle

Our experts are ready to provide the best customer service possible so give us a call today if you need help staying cool. Our team of experts will be happy to help fix the problem quickly.

And if you’re in the market for air conditioning installation services, we can help.

We know how important it is to keep you and your family safe and comfortable during a heatwave! When you need air conditioning repair, give Tiger a call at 361-852-4450.

corpus christi hvac team of technicians at Tiger Heating & AirTiger Heating and Air has been a trusted name in Corpus Christi since 1984. Whether it’s a repair, installation or maintenance, trust our team of experienced HVAC technicians to be ready to deliver the services you need. We are trained and experienced to service whatever type of heating or cooling system is in your home. We also provide professional indoor air quality services.

We are located off of TX-358, just a few miles from the exit toward Saratoga Blvd from 286 South. Call us for service any time of day or night at (361) 852-4450.

Get a free quote and see why we are the Corpus Christi company homeowners and businesses trust for honest and fair pricing. 100% Satisfaction Guaranteed!

We are located just off of TX-358. Heading south, take the exit toward Saratoga Blvd from 286 South. Turn left onto Saratoga Blvd, then 3 miles down the road, turn right onto Weber Rd and another right onto Wow Rd just across the street from the post office.