3 Quick Ways to Restore a Frozen Air Conditioner

Does the air emitting from your supply registers abruptly appear not cold enough? Inspect the indoor part of your air conditioner. This piece is situated in your furnace or air handler, if you rely on a heat pump. If there’s water leaking onto the floor, there could be crystals on the evaporator coil. The AC coil inside the unit may have frozen. You’ll need to melt it before it can cool your residence again.

Here’s what to do. If you can’t get the coil frost-free, McKinley Heating Service Experts is here to help with air conditioning repair in Edmonton upheld by a 100% satisfaction guarantee.*

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

To begin—switch the thermostat from “cool” to “off.” This halts chilly refrigerant from going to the outdoor compressor, which could hurt it and result in a costly repair.

Then, adjust the fan from “auto” to “on.” This creates warm airflow over the crystallized coils to make them thaw faster. Double check to set the cooling mode to “off” so the air conditioner doesn’t trigger a cooling cycle.

It may take under an hour or most of the day for the ice to melt, depending on the amount 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 spill over as the ice melts, possibly causing water damage.

Step 2: Pinpoint the Issue

Low airflow is a main reason for an AC to frost over. Here’s how to figure out the issue:

  • Look at the filter. Inadequate airflow through a dusty filter could be the culprit. Look at and put in a new filter monthly or immediately when you notice a layer of dust.
  • Open any shut supply vents. Your home’s supply registers should stay open always. Sealing vents reduces airflow over the evaporator coil, which could result in it freezing.
  • Check for obstructed return vents. These usually don’t have adjustable louvers, but furniture, rugs or curtains can still obstruct them.
  • Not enough refrigerant: While airflow restrictions are the most typical culprit, your system may also be low on refrigerant. Depending on when it was installed, it may use Freon® or Puron®. Low refrigerant requires professional help from a certified HVAC specialist. H2: Step 3: Get in Touch with an HVAC Expert at McKinley Heating Service Experts

If low airflow doesn’t seem to be the issue, then another issue is making your AC frost over. If this is what’s going on, merely defrosting it won’t repair the trouble. The evaporator coil will possibly freeze again unless you take care of the root cause. Contact an HVAC tech to address issues with your air conditioner, which might include:

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t run out. Not enough refrigerant means there’s a leak somewhere. Only a tech can pinpoint the leak, fix it, and recharge the system to the correct amount.
  • Grimy evaporator coil: If grime collects on the coil, air can’t reach it, and it’s apt to freeze.
  • Broken blower: A faulty motor or unbalanced fan can stop airflow over the evaporator coil.

If your AC freezes up, get in touch with the NATE-certified techs at McKinley Heating Service Experts to fix the trouble. We have years of experience helping homeowners diagnose their air conditioners, and we’re sure we can get things operating again in no time. Contact us at 780-800-7092 to book air conditioning repair in Edmonton with us right away.


*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.

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