Quick Steps for Fixing a Frozen Air Conditioner

Does the air emitting from your supply registers suddenly seem hot? Check the indoor portion of your air conditioner. This part is housed within your furnace or air handler, if you use a heat pump. If there’s water seeping onto the floor, there may be frost on the evaporator coil. The AC coil inside the system may have frozen. You’ll need to thaw it before it can cool your residence again. 

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

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

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

After that, adjust the fan from “auto” to “on.” This produces heated airflow over the crystallized coils to make them thaw faster. Double check to set the cooling mode to “off” so the air conditioner doesn’t start a cooling cycle. 

It can take under an hour or the majority of the day for the ice to thaw, depending on the level of the buildup. While you’re waiting, watch the condensate pan under the AC unit. If the drain line is obstructed, it can cause a mess as the ice melts, likely creating water damage. 

Step 2: Troubleshoot the Situation 

Poor airflow is a leading cause for an AC to become frozen. Here’s how to get to the bottom of the issue: 

  • Exmaine the filter. Low airflow through a dusty filter could be to blame. Look at and replace the filter once a month or immediately when you notice a layer of dust. 
  • Open any sealed supply vents. Your house’s supply registers should be open constantly. Closing vents reduces airflow over the evaporator coil, which might cause it to freeze. 
  • Check for obstructed return vents. These usually 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 system may also be low on refrigerant. Depending on when it was replaced, it may use Freon®. Low refrigerant calls for skilled assistance from a certified HVAC tech. H2: Step 3: Contact an HVAC Pro at Service Experts Heating, Air Conditioning & Plumbing 

If low airflow doesn’t seem to be the problem, then another problem is causing your AC frost over. If this is what’s occurring, just letting it melt won’t take care of the problem. The evaporator coil is likely to continually freeze unless you take care of the underlying cause. Contact an HVAC specialist to look for issues with your air conditioner, which can include: 

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t get used up. Insufficient refrigerant signals a leak somewhere. Only a tech can pinpoint the leak, repair it, and recharge the air conditioner 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 faulty motor or unbalanced fan might stop airflow over the evaporator coil. 

The next time your AC freezes up, call on the ACE-certified specialists at Service Experts Heating, Air Conditioning & Plumbing to repair the trouble. We have a lot of experience helping homeowners diagnose their air conditioners, and we’re sure we can get things operating again quickly. Contact us at 866-397-3787 to get air conditioning repair in the U.S. with us now. 

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