Fix Your Frozen Air Conditioner with These 3 Simple Tips

Does the air flowing from your supply registers unexpectedly seem not cold enough? Check the indoor portion of your air conditioner. This part is located in your furnace or air handler, if you have a heat pump. If there’s water leaking onto the floor, there might be frost on the evaporator coil. The AC coil in the system might have frozen. You’ll need to defrost it before it can cool your home again.

Here’s what to do. If you can’t get the coil defrosted, Barlow Service Experts is here to assist you with air conditioning repair in the Wasatch Front region backed by a 100% satisfaction guarantee.*

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

First things first—switch the thermostat from “cool” to “off.” This prevents chilly refrigerant from flowing to the outdoor compressor, which could hurt it and result in an expensive repair.

Next, switch the fan from “auto” to “on.” This creates heated airflow over the frozen coils to help them thaw faster. Remember to set the cooling mode to “off” so the air conditioner doesn’t trigger a cooling cycle.

It could take under an hour or most of the day for the ice to thaw, depending on the degree of the buildup. While you’re waiting, watch the condensate pan underneath the AC unit. If the drain line is clogged, it might spill over as the ice melts, potentially causing water damage.

Step 2: Diagnose the Issue

Poor airflow is a chief explanation for an AC to frost over. Here’s how to get to the bottom of the problem:

  • Look at the filter. Inadequate airflow through a dirty filter could be the issue. Check and change the filter once a month or as soon as you notice dust accumulation.
  • Open any shut supply vents. Your home’s supply registers should stay open constantly. Closing vents limits airflow over the evaporator coil, which could lead it to freeze.
  • Check for blocked return vents. These typically don’t come with moveable louvers, but furniture, rugs or curtains can still cover them.
  • Not enough refrigerant: While airflow restrictions are the most common suspect, your air conditioner might also not have enough refrigerant. Depending on how old it is, it may use Freon® or Puron®. Not enough refrigerant calls for skilled assistance from a certified HVAC technician. H2: Step 3: Contact an HVAC Pro at Barlow Service Experts

If low airflow doesn’t feel like the issue, then another issue is causing your AC freeze up. If this is what’s going on, simply defrosting it won’t repair the trouble. The evaporator coil will probably continually freeze unless you take care of the main cause. Call an HVAC technician to address troubles with your air conditioner, which may include:

  • Refrigerant leak: AC units recycle refrigerant, so it shouldn’t get used up. Low refrigerant signals a leak somewhere. Only a professional can find the leak, repair it, and recharge the system to the proper level.
  • Filthy evaporator coil: If dust builds up on the coil, air can’t flow over it, and it’s apt to freeze.
  • Malfunctioning blower: A bad motor or unbalanced fan may prevent airflow over the evaporator coil.

If your AC freezes up, call on the NATE-certified technicians at Barlow Service Experts to fix the problem. We have a lot of experience helping homeowners troubleshoot their air conditioners, and we’re sure we can get things operating again quickly. Contact us at 801-436-8985 to schedule air conditioning repair in the Wasatch Front 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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