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Common AC Problems: My AC Is Frozen!

Air conditioners are complex, so it’s no surprise there are times things go wrong. Most AC systems are built to dependably deliver cool air to your home during the warmer months, but once in a while, you might need to call in a professional to take a look at your unit.

When your home’s air conditioner is freezing up, it can be due to:

  • A faulty thermostat. Also, if the temperature at night happens to go below 60 degrees, it could throw your AC out of whack.
  • Blocked airflow. AC units need a constant flow of air. Otherwise, humidity settles on the coils and freezes. This restricts the airflow in your house.
  • Moving parts that break, clog up, or get stuck. Refrigerant lines might kink or leak, filters become clogged, and fans stop moving. These issues can cause a drop in pressure and allow the refrigerant to overexpand and become too cold.

To thaw out a frozen AC, turn the thermostat off and turn the fan on. After a few hours, the unit should be fully defrosted.

How to Fix an Air Conditioner That Freezes Up

Your home’s air conditioner requires proper airflow to keep its cold coil warm. Warm air from inside your home is necessary to keep the coil cold and the temperature above freezing. Without adequate airflow, coils freeze before the condensed water can drain away from the unit. While you can fix some AC problems yourself, like changing the filters, many others call for a trained and qualified HVAC technician’s skills and expertise.

Keep in mind if an air conditioner continues to run with frozen coils, it can lead to extensive compressor damage, the most expensive part of an AC unit. You might try some of these simple repairs yourself, but a damaged compressor is not an issue or expense you want to deal with!

  1. Check the thermostat to make sure it’s working right and is set to the correct temperature. A programmable thermostat helps to prevent your temperature from dipping below 60 degrees by automatically shutting down the system when that starts to happen.
  2. Replace dirty air filters that typically cause a blocked airflow. Air filters are inexpensive and should be changed regularly.
  3. Call an HVAC technician to address mechanical problems and leaks. They are trained to know how to handle refrigerants and an AC’s many moving parts.

Finally, the best way to keep your home’s air conditioning system running as efficiently as possible is to have it regularly maintained, cleaned, and inspected.

Schedule a Repair Call

If your home’s air conditioner is freezing up, the professional HVAC technicians at Aladdin Air Conditioning & Heating can often determine the cause — and provide any repairs needed — in a far shorter time than you can yourself. If you’re dealing with a frozen AC unit, contact us today to have one of our friendly and experienced team members the problem right away. You can contact us online or call us at (805) 480-0327 or (805) 480-0327.

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Office Location

1090 Lawrence Dr. #105
Newbury Park, CA 91320

License #739136


Ventura County


San Fernando Valley