3 Fast Ways to Repair a Frozen Air Conditioner

Does the air flowing from your supply registers unexpectedly seem hot? Check the indoor part of your air conditioner. This piece is situated in your furnace or air handler, if you have a heat pump. If there’s water dripping onto the floor, there could be crystals on the evaporator coil. The AC coil in the system could have frosted over. You’ll need to defrost it before it can cool your home again.

Here’s the steps you should take. If you can’t get the coil defrosted, Service Experts Heating & Air Conditioning is here to support you with air conditioning repair in the Niagara Region upheld by a 100% satisfaction guarantee.*

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

To get started—set the thermostat from “cool” to “off.” This prevents cold refrigerant from moving to the outdoor compressor, which could damage it and cause a costly repair.

Next, switch the fan from “auto” to “on.” This makes hot airflow over the frosty coils to make them defrost faster. Double check to set the cooling mode to “off” so the air conditioner doesn’t begin 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 extent of the accumulation. While you’re waiting, keep an eye on the condensate pan underneath the AC unit. If the drain line is clogged, it can overflow as the ice melts, potentially creating water damage.

Step 2: Troubleshoot the Trouble

Poor airflow is a chief cause for an AC to frost over. Here’s how to troubleshoot the issue:

  • Check the filter. Low airflow through a clogged filter could be the culprit. Check and change the filter once a month or once you see dust accumulation.
  • Open any shut supply vents. Your house’s supply registers should remain open always. Sealing vents reduces airflow over the evaporator coil, which could cause it to freeze.
  • Look for blocked return vents. These often don’t use shiftable louvers, but furniture, rugs or curtains can still obstruct them.
  • Not enough refrigerant: While airflow restrictions are the most typical suspect, your air conditioning might also be low on refrigerant. Depending on when it was installed, it may use Freon® or Puron®. Insufficient refrigerant calls for pro assistance from a certified HVAC tech. H2: Step 3: Call an HVAC Tech at Service Experts Heating & Air Conditioning

If insufficient airflow doesn’t feel like the problem, then something else is making your AC freeze up. If this is what’s going on, simply letting it melt won’t take care of the problem. The evaporator coil will possibly keep freezing unless you fix the root cause. Get in touch with an HVAC tech to look for troubles with your air conditioner, which can include:

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t run low. Low refrigerant indicates a leak somewhere. Only a specialist can pinpoint the leak, repair it, and recharge the air conditioner to the appropriate concentration.
  • Dirty evaporator coil: If dirt builds up on the coil, air can’t reach it, and it’s likely to freeze.
  • Broken blower: A bad motor or unbalanced fan may halt airflow over the evaporator coil.

If your AC freezes up, call on the NATE-certified professionals at Service Experts Heating & Air Conditioning to fix the situation. We have lots of experience helping homeowners diagnose their air conditioners, and we’re sure we can get things working again quickly. Contact us at 289-273-2229 to book air conditioning repair in the Niagara Region 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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