3 Simple Steps for Repairing a Frozen Air Conditioner

Does the air emitting from your supply registers abruptly appear hot? Look at 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 might be frost on the evaporator coil. The AC coil inside the unit may have frozen. You’ll need to melt it before it can cool your house again.

Here’s what to do. If you can’t get the coil back to normal, McKinley Heating Service Experts is here to help with air conditioning repair in Edmonton that includes a 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 harm it and result in a costly repair.

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

It may take under an hour or the majority of the day for the ice to defrost, depending on the amount of the accumulation. While you’re waiting, keep an eye on the condensate pan under the AC unit. If the drain line is clogged, it may spill over as the ice melts, possibly causing water damage.

Step 2: Pinpoint the Issue

Poor airflow is a main cause for an AC to frost over. Here’s how to get to the bottom of the situation:

  • 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 be open always. Shutting vents reduces airflow over the evaporator coil, which could result in it freezing.
  • Check for covered return vents. These usually don’t have adjustable louvers, but furniture, rugs or curtains can still obstruct them.
  • Insufficient 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®. Low refrigerant requires professional help from a certified HVAC tech. H2: Step 3: Contact an HVAC Pro at McKinley Heating Service Experts

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

  • Refrigerant leak: AC units continuously use refrigerant, so it shouldn’t run out. Insufficient refrigerant means there’s a leak somewhere. Only a professional can pinpoint the leak, fix it, and recharge the system to the correct amount.
  • Grimy evaporator coil: If grime accumulates on the coil, air can’t reach it, and it’s likely to freeze.
  • Broken blower: A faulty motor or unbalanced fan can halt airflow over the evaporator coil.

If your AC freezes up, get in touch with the ACE-certified techs at McKinley Heating Service Experts to fix the trouble. We have years of experience helping homeowners check 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 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.

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