Why Do Air Conditioners Freeze Up?

Air conditioners freezing up is anything but a rare occurrence. It’s important to address this issue right away as your unit won’t cool properly if it’s frozen and can become damaged. There are five common reasons that your AC could freeze up.

Clogged Air Filter

If the air filter in your cooling system gets too dirty, it restricts airflow. Your air conditioner needs proper air circulation to work as it should. The first thing to do is check the air filter and replace it if it’s visibly dirty. You should be likely be replacing your filter every one to three months, so consult with your technician about your unit’s filter schedule.

ac freeze up

Dirty Evaporative Coil

If changing the air filter didn’t work, check the evaporative coil next. You should clean it as a buildup of dust and dirt can cause an air conditioner to freeze up. You can find the evaporative coil inside or near the air handler and blower fan.

Certified Service in Burbank, CA, can help you with frozen air conditioners and other cooling problems. We’ve been serving our community since 1972.

Collapsed Ducts

If the air filter and evaporative coil aren’t the problems, the next thing to do is check for collapsed ducts. A duct may have fallen or become misaligned and needs to be put back into place and secured. Just like a dirty air filter, a collapsed duct means that your air conditioner isn’t getting enough airflow.

Dirty Ducts

Dirty ducts also reduce airflow. Remove your registers and look inside the ductwork. If they’re extremely dirty, they can cause your air conditioner to freeze up. You may need to have your ducts cleaned by a heating and cooling professional.

Low Refrigerant

Air conditioners freezing up can be caused by low refrigerant. You will need to have a cooling company measure the refrigerant level and its pressure. They can recharge the refrigerant and correct its pressure if that’s a problem.

Certified Service is your go-to company in Burbank and the LA area for repairs and air conditioner tune-ups. Our services also include heating system service and repair and ductless AC mini-split systems. Get in touch today to find out more about our company and services.