Even in an area with warm temperatures, it’s possible for an air conditioner to freeze. It’s essential to address a frozen air conditioner right away; otherwise, it can lead to your home becoming water damaged. What causes an air conditioner to freeze, and what should you do if it happens?

Low Refrigerant
Your air conditioner’s evaporator coil contains refrigerant. Without a sufficient amount of coolant, your A/C will not be able to remove enough heat from the air. Low refrigerant indicates a leak, which will need to be fixed by an air conditioning contractor.

Poor Airflow
The temperature of your air conditioner’s evaporator coil can dip below freezing if the airflow is diminished. Reduced airflow causes moisture in the air to condense on the coil, where it becomes frozen. If this occurs, have your air conditioner serviced by a repair technician.

Evaporator Coil is Dirty
It’s crucial for your evaporator coil to be kept clean; this will help prevent your air conditioning unit from freezing. Dirt buildup on the coil acts as a barrier between the refrigerant inside the coil and the warm air outside. It causes the evaporator coil to freeze because it’s too cold.

What to Do If Your A/C Is Frozen
Here are some steps you can take if your air conditioner is freezing up:

  • Turn the unit off. Do not just increase the temperature with the thermostat–turn the cooling system off entirely.
  • Try replacing your air filters. Clogged filters interfere with airflow.
  • If any supply vents in your home are closed, open them to let air flow through. Make sure to open vents in unused rooms, too.
  • Make sure that your return vents and your air ducts are kept clear and unblocked.

After you’ve done the above steps, contact a repair technician for help as soon as you can. An HVAC contractor will have your air conditioner up and running again in no time.

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