Fix Your Frozen Air Conditioner with These 3 Quick Tips

Does the air coming from your supply registers abruptly appear hot? Check the indoor portion of your air conditioner. This component is situated within your furnace or air handler, if you use a heat pump. If there’s water leaking onto the floor, there might be crystals on the evaporator coil. The AC coil in the unit might have frozen over. You’ll need to melt it before it can cool your house again.

Here’s the steps you should take. If you can’t get the coil defrosted, Komfort Air is here to help with air conditioning repair in Charlotte backed by a 100% satisfaction guarantee.*

Step 1: Switch the Air Conditioning Off and the Blower On

First things first—move the thermostat from “cool” to “off.” This halts chilled refrigerant from moving to the outdoor compressor, which could hurt it and lead to a pricey repair.

Then, move the fan from “auto” to “on.” This creates warm airflow over the frosty coils to force them to thaw faster. Remember to set the cooling mode to “off” so the air conditioner doesn’t start a cooling cycle.

It may take not more than an hour or the majority of the day for the ice to melt, depending on the level of the ice. While you’re waiting, keep an eye on the condensate pan under the AC unit. If the drain line is clogged, it could create a mess as the ice melts, likely creating water damage.

Step 2: Troubleshoot the Situation

Bad airflow is a main reason for an AC to become frozen. Here’s how to get to the bottom of the situation:

  • Check the filter. Insufficient airflow through a dirty filter could be to blame. Inspect and replace the filter once a month or once you see dust accumulation.
  • Open any shut supply vents. Your home’s supply registers should remain open always. Shutting vents decreases airflow over the evaporator coil, which could cause it to freeze.
  • Check for covered return vents. These typically don’t have adjustable louvers, but furniture, rugs or curtains can still block them.
  • Not enough refrigerant: While airflow restrictions are the most typical suspect, your air conditioning might also have insufficient refrigerant. Depending on when it was replaced, it may have Freon® or Puron®. Not enough refrigerant requires professional help from a certified HVAC technician. H2: Step 3: Call an HVAC Technician at Komfort Air

If insufficient airflow doesn’t appear to be the issue, then something else is causing your AC freeze up. If this is the case, simply defrosting it won’t repair the trouble. The evaporator coil will possibly continually freeze unless you repair the main symptom. Contact an HVAC specialist to look for problems with your air conditioner, which can include:

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t get used up. Insufficient refrigerant is a sign of a leak somewhere. Only a technician can find the leak, fix it, and recharge the system to the proper amount.
  • Grimy evaporator coil: If dirt builds up on the coil, air can’t reach it, and it’s likely to freeze.
  • Nonfunctional blower: A defective motor or unbalanced fan could stop airflow over the evaporator coil.

The next time your AC freezes up, contact the NATE-certified professionals at Komfort Air to repair the issue. We have a lot of experience helping homeowners troubleshoot their air conditioners, and we’re confident we can get things running again in no time. Contact us at 704-705-8135 to book air conditioning repair in Charlotte with us now.


*Not applicable to the Advantage Program. See your signed Advantage Program agreement for full details and exclusions. 100% Satisfaction Guarantee is subject to certain restrictions and limitations as set forth in the applicable Terms and Conditions.

Contact Us