Simple Steps to Fix a Frozen Air Conditioner

Does the air flowing from your supply registers unexpectedly seem not cold enough? Look at the indoor part of your air conditioner. This piece is housed inside your furnace or air handler, if you rely on a heat pump. If there’s water dripping onto the floor, there might be frost on the evaporator coil. The AC coil within the equipment may have frozen over. You’ll need to thaw it before it can cool your home again. 

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

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

To get started—switch the thermostat from “cool” to “off.” This prevents cold refrigerant from moving to the outdoor compressor, which could hurt it and result in an expensive repair. 

After that, move the fan from “auto” to “on.” This creates hot airflow over the crystallized coils to make them thaw faster. Make sure to set the cooling mode to “off” so the air conditioner doesn’t begin a cooling cycle. 

It may take under an hour or the majority of the day for the ice to defrost, depending on the level of the ice. While you’re waiting, keep an eye on the condensate pan below the AC unit. If the drain line is obstructed, it may create a mess as the ice melts, possibly causing water damage. 

Step 2: Pinpoint the Issue 

Poor airflow is a leading cause for an AC to frost over. Here’s how to figure out the issue: 

  • Check the filter. Inadequate airflow through a dusty filter could be the problem. Inspect and replace the filter each month or as soon as you notice dust buildup. 
  • Open any closed supply vents. Your house’s supply registers should be open all the time. Sealing vents limits airflow over the evaporator coil, which might cause it to freeze. 
  • Be on the lookout for blocked return vents. These typically don’t come with moveable louvers, but furniture, rugs or curtains can still block them. 
  • Low refrigerant: While airflow restrictions are the most common suspect, your system might also be low on refrigerant. Depending on how old it is, it may use Freon®. Insufficient refrigerant necessitates pro attention from a certified HVAC specialist. H2: Step 3: Call an HVAC Pro at Service Experts Heating, Air Conditioning & Plumbing 

If insufficient airflow doesn’t appear to be the trouble, then another issue is leading your AC freeze. If this is what’s happening, simply defrosting it won’t repair the problem. The evaporator coil is likely to continually freeze unless you fix the main symptom. Contact an HVAC tech to address troubles with your air conditioner, which may include: 

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t run out. Insufficient refrigerant means there’s a leak somewhere. Only a technician can locate the leak, repair it, and recharge the air conditioning to the proper concentration. 
  • Dirty evaporator coil: If grime accumulates on the coil, air can’t get to it, and it’s likely to freeze. 
  • Malfunctioning blower: A faulty motor or unbalanced fan could stop airflow over the evaporator coil. 

If your AC freezes up, get in touch with the ACE-certified techs at Service Experts Heating, Air Conditioning & Plumbing to take care of the trouble. We have a lot of experience helping homeowners check their air conditioners, and we’re certain we can get things operating again in no time. Contact us at 866-397-3787 to schedule air conditioning repair in the U.S. with us today. 

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