Why Does Your Air Conditioner Freeze in Summer?

The summer can get so hot in Rock Hill, so how in the world is your air conditioner freezing over? It seems to make no sense. You may not even realize it’s occurring. How will you determine if your air conditioner is frozen? It may seem like a ridiculous question, but you generally won’t actually see the ice except in extreme cases. Here are symptoms to look for that indicate you could have a frozen AC system that could be in need of air conditioning service:

  • Warm air is coming out of your registers while the air conditioner is running.
  • Water is leaking from or pooling under your air conditioner.

When we say the air conditioner is frozen, what’s actually frozen is the evaporator coil, which transfers heat out of your home to keep it cool. There are two main explanations that an evaporator coil may freeze; one is a refrigerant leak and the other reason is a blockage of airflow.

If your air conditioner has a refrigerant leak, you will want to discuss with your US Air Heating and Cooling technician during your air conditioning service appointment to understand if you will benefit more from repairing or replacing your air conditioner. We can help you assess the pros and cons using information such as the age of your air conditioner and its service history, along with other things.

If your air conditioner has frozen because of an airflow blockage, it’s because there is not enough air passing over the evaporator coil to dry the condensation that builds up on it—then it freezes. Air flow blockages are commonly caused by dirty air filters or even dirty cooling fins. These problems can be alleviated (and avoided!) by a routine air conditioner service appointment. At these service sessions, your technician will clean your system, replace your air filters and confirm everything is running as it should with no potential problems on the horizon. It’s also a valuable idea to mark your calendar or set a reminder on your phone to check your air filters frequently and change your air filters when they are dirty. Always make sure that furniture, curtains and other household items aren’t blocking your registers, as even this could cause a significant airflow problem and the subsequent freezing problems.

If your air conditioner freezes, turn it off using your thermostat and call the pros at US Air Heating and Cooling to schedule an air conditioning service appointment. We’ll help you identify the issue and have your home back to cool and comfortable in no time. Call us at 803-980-4328 to schedule an appointment with us.

Back To Blog