3 Fast Steps for Fixing a Frozen Air Conditioner

Does the air flowing from your supply registers abruptly appear warm? Check the indoor part of your air conditioner. This component is situated inside your furnace or air handler, if you use a heat pump. If there’s water dripping onto the floor, there may be frost on the evaporator coil. The AC coil inside the system may have frozen. 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 back to normal, A1 Chesney Service Experts is here to support you with air conditioning repair in Calgary upheld by a 100% satisfaction guarantee.*

Step 1: Set the Air Conditioning to Off and the Blower On

To begin—switch the thermostat from “cool” to “off.” This stops chilled refrigerant from moving to the outdoor compressor, which could damage it and lead to a costly repair.

After that, switch the fan from “auto” to “on.” This produces heated airflow over the frosty coils to help them defrost faster. Double check to set the cooling mode to “off” so the air conditioner doesn’t start a cooling cycle.

It might take under an hour or the majority of the day for the ice to thaw, depending on the extent of the accumulation. While you’re waiting, watch the condensate pan underneath the AC unit. If the drain line is blocked, it might create a mess as the ice melts, possibly creating water damage.

Step 2: Pinpoint the Problem

Insufficient airflow is a primary explanation for an AC to freeze up. Here’s how to get to the bottom of the situation:

  • Exmaine the filter. Inadequate airflow through a filthy filter could be the problem. Check and put in a new filter once a month or once you notice dust accumulation.
  • Open any shut supply vents. Your house’s supply registers should remain open all the time. Shutting vents decreases airflow over the evaporator coil, which might cause it to freeze.
  • Check for blocked return vents. These typically don’t come with adjustable louvers, but furniture, rugs or curtains can still block them.
  • Not enough refrigerant: While airflow restrictions are the most common culprit, your air conditioner might also not have enough refrigerant. Depending on when it was installed, it may rely on Freon® or Puron®. Insufficient refrigerant calls for pro support from a certified HVAC technician. H2: Step 3: Call an HVAC Expert at A1 Chesney Service Experts

If poor airflow doesn’t feel like the problem, then another problem is leading your AC frost over. If this is what’s occurring, just letting it melt won’t fix the issue. The evaporator coil will possibly freeze again unless you repair the main symptom. Contact an HVAC professional to look for issues with your air conditioner, which might include:

  • Refrigerant leak: AC units recycle refrigerant, so it shouldn’t run out. Low refrigerant indicates a leak somewhere. Only a technician can find 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 likely to freeze.
  • Broken blower: A broken motor or unbalanced fan could stop airflow over the evaporator coil.

If your AC freezes up, contact the NATE-certified technicians at A1 Chesney Service Experts to fix the problem. We have a lot of experience helping homeowners check their air conditioners, and we’re sure we can get things operating again quickly. Contact us at 587-315-5271 to schedule air conditioning repair in Calgary 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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