3 Quick Steps for Repairing a Frozen Air Conditioner

Does the air coming from your supply registers abruptly feel hot? Look at the indoor portion of your air conditioner. This part is located inside your furnace or air handler, if you use a heat pump. If there’s water seeping onto the floor, there may be crystals on the evaporator coil. The AC coil within the system might have frozen 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, Strand Brothers Service Experts is here to help with air conditioning repair in Austin backed by a 100% satisfaction guarantee.*

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

To begin—set the thermostat from “cool” to “off.” This prevents chilly refrigerant from moving to the outdoor compressor, which could hurt it and lead to an expensive repair.

Next, switch the fan from “auto” to “on.” This produces warm airflow over the crystallized coils to force them to melt faster. Double check to set the cooling mode to “off” so the air conditioner doesn’t trigger a cooling cycle.

It can take not more than an hour or the majority of the day for the ice to melt, depending on the level of the accumulation. While you’re waiting, check the condensate pan under the AC unit. If the drain line is blocked, it can create a mess as the ice melts, possibly resulting in water damage.

Step 2: Troubleshoot the Problem

Bad airflow is a main cause for an AC to frost over. Here’s how to troubleshoot the situation:

  • Check the filter. Insufficient airflow through a dirty filter could be the issue. Look at and put in a new filter once a month or once you observe a layer of dust.
  • Open any shut supply vents. Your house’s supply registers should be open always. Closing vents limits airflow over the evaporator coil, which could cause it to freeze.
  • Look for obstructed return vents. These usually don’t use moveable louvers, but furniture, rugs or curtains can still obstruct them.
  • Low refrigerant: While airflow restrictions are the most typical cause, your air conditioner might also not have enough refrigerant. Depending on its age, it may rely on Freon® or Puron®. Low refrigerant requires skilled assistance from a certified HVAC tech. H2: Step 3: Call an HVAC Pro at Strand Brothers Service Experts

If low airflow doesn’t seem to be the trouble, then another issue is leading your AC freeze up. If this is what’s occurring, simply defrosting it won’t take care of the issue. The evaporator coil is likely to freeze again unless you fix the underlying problem. Get in touch with an HVAC specialist to address problems with your air conditioner, which could include:

  • Refrigerant leak: AC units recycle refrigerant, so it shouldn’t run out. Not enough refrigerant is a sign of a leak somewhere. Only a professional can find the leak, mend it, and recharge the air conditioner to the appropriate level.
  • Grimy evaporator coil: If dust builds up on the coil, air can’t flow over it, and it’s liable to freeze.
  • Nonfunctional blower: A bad motor or unbalanced fan could halt airflow over the evaporator coil.

The next time your AC freezes up, get in touch with the NATE-certified professionals at Strand Brothers Service Experts to take care of the issue. We have lots of experience helping homeowners troubleshoot their air conditioners, and we’re certain we can get things running again in no time. Contact us at 512-592-3072 to get air conditioning repair in Austin 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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