Why is My Home A/C Freezing Up? Causes & How to Fix It?


One of the reasons your A/C may not be functioning properly is that it has perhaps frozen up. Freezing can be seen within the evaporator coil, or on the exterior of the outside unit (the condenser coils). So you’re probably asking yourself, “why is my home AC freezing up?” The culprit is usually one of the following:

  • Inadequate airflow – This can occur when too many vents are closed or when your air filter is dirty and blocks proper airflow from occurring throughout the system.
  • The setting is too cold – Not all air-conditioning filters are intended to run at extremely low temps for prolonged periods. A good tip here is to install and use a smart thermostat.
  • Improper Freon Levels – If your system is low or high on Freon/refrigerant, it could cause the temperature of your evaporator to drop, freezing moisture and thus icing up the system. This could be due to a Freon/refrigerant leak that a contractor will need to repair.

Diagnosing the Problem

Now that you know your A/C is likely freezing up, how do you go about diagnosing the issue? For starters, check the air filter. If it’s clogged, simply replace it and your problem should not persist. Also try unblocking vents. Sometimes household furnishings such as furniture and drapes can get in the way. Otherwise, it could be a Freon problem (leak) or that fact that you’re simply running the system too cold for too long.

Important note: Before a repair can be done, it’s also important to defrost the system. Run the system with the fan on but the a/c off for 24 hours then call Sedgwick.

For a proper diagnosis and to get your HVAC system back in topnotch shape, contact the experts at Sedgwick.

Emergency Heating & AC Repair in MinneapolisContact Us for 24/7 Emergency Repair