3 Fast Steps to Fix a Frozen Air Conditioner

Does the air emitting from your supply registers abruptly seem hot? Check the indoor part of your air conditioner. This component is situated inside your furnace or air handler, if you have a heat pump. If there’s water dripping onto the floor, there could be ice on the evaporator coil. The AC coil inside the unit may have frozen. You’ll need to thaw it before it can cool your home again.

Here’s the things you should do. If you can’t get the coil frost-free, Service Experts Heating & Air Conditioning is here to support you with air conditioning repair in North America upheld by a 100% satisfaction guarantee.*

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

To get started—move the thermostat from “cool” to “off.” This halts chilled refrigerant from flowing to the outdoor compressor, which could harm it and cause an expensive repair.

Next, adjust the fan from “auto” to “on.” This creates hot airflow over the frozen coils to force them to thaw faster. Make sure to set the cooling mode to “off” so the air conditioner doesn’t start a cooling cycle.

It could take less 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, watch the condensate pan under the AC unit. If the drain line is clogged, it could overflow as the ice melts, likely causing water damage.

Step 2: Troubleshoot the Trouble

Not enough airflow is a main explanation for an AC to frost over. Here’s how to figure out the problem:

  • Look at the filter. Low airflow through a dusty filter could be the problem. Check and replace the filter once a month or immediately when you observe a layer of dust.
  • Open any closed supply vents. Your home’s supply registers should be open constantly. Shutting vents limits airflow over the evaporator coil, which may result in it freezing.
  • Be on the lookout for covered return vents. These often don’t have moveable louvers, but furniture, rugs or curtains can still cover them.
  • Not enough refrigerant: While airflow restrictions are the most typical cause, your air conditioner might also be low on refrigerant. Depending on when it was replaced, it may rely on Freon®. Low refrigerant requires professional attention from a certified HVAC specialist. H2: Step 3: Get in Touch with an HVAC Specialist at Service Experts Heating & Air Conditioning

If poor airflow doesn’t seem to be the problem, then another issue is leading your AC freeze up. If this is what’s going on, simply defrosting it won’t take care of the trouble. The evaporator coil will possibly freeze again unless you repair the underlying symptom. Contact an HVAC professional to address troubles with your air conditioner, which can include:

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t run out. Low refrigerant indicates a leak somewhere. Only a technician can pinpoint the leak, mend it, and recharge the air conditioning to the correct amount.
  • Filthy evaporator coil: If grime accumulates on the coil, air can’t get to it, and it’s apt to freeze.
  • Malfunctioning blower: A bad motor or unbalanced fan can stop airflow over the evaporator coil.

When your AC freezes up, get in touch with the ACE-certified pros at Service Experts Heating & Air Conditioning to repair the situation. We have a lot of experience helping homeowners diagnose their air conditioners, and we’re certain we can get things working again fast. Contact us at 866-397-3787 to book air conditioning repair in North America with us today.


*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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