Why Is My Air Conditioner Freezing Up?

AC Freezing Issues

An air conditioner freezing up might seem counterintuitive, especially when its purpose is to keep you cool. However, this issue is more common than you might think and it can stem from a variety of underlying factors.

In this blog post, we’ll delve into a few reasons why you might find your air conditioner freezing up. If you see frost or ice on your air conditioner now—take a moment to turn your system off before you continue reading.

Restricted Airflow

Though not the only cause, inadequate airflow is mostly likely the reason why your air conditioning is freezing up. When airflow is limited, the evaporator coils can become too cold, causing the condensation on them to freeze. Poor airflow could be caused by:

  • clogged or dirty air filters
  • closed vents
  • blocked ducts
  • other restrictions

A qualified HVAC technician will be able to identify and rectify any airflow restrictions in your system.

Low Refrigerant Levels

Another potential cause for your air conditioner freezing up is insufficient refrigerant levels. If your system is low on freon, the evaporator coils can become too cold which will lead to freezing.

Refrigerant is responsible for absorbing heat from the indoor air, and if levels are low, the coils can ice over. You will need the help of an HVAC technician to locate and fix any leaks before recharging your system with refrigerant.

Pushing Your AC Beyond its Limits

Aggressive thermostat settings, such as running the AC continuously or setting it too low, can cause the evaporator coils to freeze. It’s important to make sure that your thermostat settings are appropriate for the weather and usage patterns. Keep in mind that your AC is not a refrigerator. As a rule of thumb, expect your air conditioner to keep your home 15-25 degrees cooler than the outside temperature. Pushing your AC beyond these limits can cause it to freeze up—especially on hotter days.

Failed Blower Fan Motor

A blower fan is responsible for pushing conditioned (heated or cooled) air into your home. As it does this, the airflow created by the blower fan works to keep the coils from becoming excessively cold.

Failure of the fan motor will cause the coils to freeze. If your blower fan fails, you may notice that your AC system is much quieter.

AC Repair in Spring Hill, TN

While an air conditioner freezing up might be an unexpected problem, it’s one that can be fixed once the cause is successfully identified. Unless you are able to determine that the ice is caused by dirty filters, it’s unlikely that you’ll be able to resolve the problem on your own.

If you are located in Middle TN and you find your air conditioner freezing up, our certified technicians are happy to help. We proudly serve Spring Hill and the surrounding cities. Give us a call today at 931-281-1211.

Share This Story, Choose Your Platform!

Go to Top