3 Quick Ways to Repair a Frozen Air Conditioner

Does the air emitting from your supply registers unexpectedly appear warm? Inspect the indoor portion of your air conditioner. This component is situated within your furnace or air handler, if you rely on a heat pump. If there’s water dripping onto the floor, there could be ice on the evaporator coil. The AC coil within the system might have frosted over. You’ll need to melt it before it can cool your residence again.

Here’s the steps you should take. If you can’t get the coil frost-free, Service Experts Heating & Air Conditioning is here to help with air conditioning repair in Canada backed by a 100% satisfaction guarantee.*

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

First things first—set the thermostat from “cool” to “off.” This prevents chilly refrigerant from flowing to the outdoor compressor, which could hurt it and cause a costly repair.

After that, adjust the fan from “auto” to “on.” This produces warm airflow over the frosty coils to make them melt faster. Make sure to set the cooling mode to “off” so the air conditioner doesn’t begin a cooling cycle.

It can take not more than an hour or the better part of a day for the ice to thaw, depending on the level of the buildup. While you’re waiting, watch the condensate pan under the AC unit. If the drain line is blocked, it may spill over as the ice melts, possibly causing water damage.

Step 2: Troubleshoot the Trouble

Insufficient airflow is a main cause for an AC to freeze up. Here’s how to troubleshoot the problem:

  • Check the filter. Poor airflow through a dirty filter could be to blame. Check and change the filter monthly or immediately when you notice a layer of dust.
  • Open any closed supply vents. Your house’s supply registers should be open all the time. Closing vents limits airflow over the evaporator coil, which could cause it to freeze.
  • Check for covered return vents. These often don’t use moveable louvers, but furniture, rugs or curtains can still obstruct them.
  • Not enough refrigerant: While airflow restrictions are the most typical culprit, your air conditioner might also not have enough refrigerant. Depending on how old it is, it may have Freon® or Puron®. Low refrigerant requires skilled assistance from a certified HVAC tech. H2: Step 3: Call an HVAC Specialist at Service Experts Heating & Air Conditioning

If insufficient airflow doesn’t seem to be the problem, then another problem is causing your AC freeze. If this is what’s going on, simply defrosting it won’t repair the problem. The evaporator coil will probably keep freezing unless you fix the main problem. Contact an HVAC technician to check for issues with your air conditioner, which may include:

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t run out. Low refrigerant means there’s a leak somewhere. Only a tech can pinpoint the leak, repair it, and recharge the system to the correct level.
  • Grimy evaporator coil: If dust accumulates on the coil, air can’t reach it, and it’s apt to freeze.
  • Nonfunctional blower: A defective motor or unbalanced fan might prevent airflow over the evaporator coil.

When your AC freezes up, contact the NATE-certified techs at Service Experts Heating & Air Conditioning to fix the issue. We have lots of experience helping homeowners check their air conditioners, and we’re confident we can get things running again fast. Contact us at 866-397-3787 to book air conditioning repair in Canada 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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