3 Quick Steps to Fix a Frozen Air Conditioner

Does the air emitting from your supply registers suddenly appear not cold enough? Check the indoor part of your air conditioner. This component is housed within your furnace or air handler, if you rely on a heat pump. If there’s water seeping onto the floor, there could be crystals on the evaporator coil. The AC coil inside the unit could have frozen. You’ll need to thaw it before it can cool your house again.

Here’s what to do. If you can’t get the coil defrosted, Golden Seal Service Experts is here to support you with air conditioning repair in Saint Charles that includes a 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 halts chilled refrigerant from going to the outdoor compressor, which could hurt it and lead to a costly repair.

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

It might take less than an hour or most of the day for the ice to melt, depending on the extent of the ice. While you’re waiting, check the condensate pan below the AC unit. If the drain line is obstructed, it might create a mess as the ice melts, likely causing water damage.

Step 2: Pinpoint the Issue

Insufficient airflow is a prime explanation for an AC to frost over. Here’s how to figure out the situation:

  • Look at the filter. Poor airflow through a dirty filter could be to blame. Look at and put in a new filter monthly or once you see a layer of dust.
  • Open any shut supply vents. Your residence’s supply registers should remain open constantly. Closing vents decreases airflow over the evaporator coil, which might lead it to freeze.
  • Check for obstructed return vents. These typically don’t come with moveable louvers, but furniture, rugs or curtains can still obstruct them.
  • Not enough refrigerant: While airflow restrictions are the most frequent cause, your system might also be low on refrigerant. Depending on when it was installed, it may use Freon® or Puron®. Low refrigerant requires professional attention from a certified HVAC specialist. H2: Step 3: Get in Touch with an HVAC Pro at Golden Seal Service Experts

If low airflow doesn’t feel like the problem, then another problem is making your AC freeze. If this is what’s happening, just letting it melt won’t take care of the trouble. The evaporator coil will possibly keep freezing unless you fix the root symptom. Get in touch with an HVAC professional to address problems with your air conditioner, which could include:

  • Refrigerant leak: AC units recycle refrigerant, so it shouldn’t get used up. Not enough refrigerant means there’s a leak somewhere. Only a specialist can find the leak, mend it, and recharge the system to the correct concentration.
  • Dirty evaporator coil: If dust collects on the coil, air can’t get to it, and it’s apt to freeze.
  • Malfunctioning blower: A defective motor or unbalanced fan may stop airflow over the evaporator coil.

The next time your AC freezes up, contact the NATE-certified professionals at Golden Seal Service Experts to take care of the trouble. We have lots of experience helping homeowners diagnose their air conditioners, and we’re certain we can get things working again quickly. Contact us at 630-246-2698 to get air conditioning repair in Saint Charles 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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