Quick Steps for Fixing a Frozen Air Conditioner

Does the air emitting from your supply registers abruptly feel hot? Check the indoor component of your air conditioner. This part is situated in your furnace or air handler, if you rely on a heat pump. If there’s water dripping onto the floor, there could be crystals 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 residence again. 

Here’s what to do. If you can’t get the coil frost-free, Service Experts Heating, Air Conditioning & Plumbing is here to support you 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—move the thermostat from “cool” to “off.” This halts chilled refrigerant from flowing to the outdoor compressor, which could damage it and lead to an expensive repair. 

After that, adjust the fan from “auto” to “on.” This produces warm airflow over the frosty coils to force them to defrost faster. Double check to set the cooling mode to “off” so the air conditioner doesn’t begin a cooling cycle. 

It can take less than an hour or most of the day for the ice to defrost, depending on the level of the buildup. While you’re waiting, watch the condensate pan underneath the AC unit. If the drain line is blocked, it may cause a mess as the ice melts, likely resulting in water damage. 

Step 2: Diagnose the Problem 

Not enough airflow is a leading reason for an AC to become frozen. Here’s how to get to the bottom of the situation: 

  • Inspect the filter. Insufficient airflow through a dirty filter could be the problem. Inspect and replace the filter each month or as soon as you see dust buildup. 
  • Open any closed supply vents. Your residence’s supply registers should be open all the time. Closing vents reduces airflow over the evaporator coil, which may result in it freezing. 
  • Be on the lookout for covered return vents. These often don’t come with adjustable louvers, but furniture, rugs or curtains can still cover them. 
  • Insufficient refrigerant: While airflow restrictions are the most typical culprit, your air conditioning might also be low on refrigerant. Depending on when it was installed, it may have Freon®. Not enough refrigerant requires skilled assistance from a certified HVAC specialist. H2: Step 3: Get in Touch with an HVAC Pro at Service Experts Heating, Air Conditioning & Plumbing 

If poor airflow doesn’t seem to be the trouble, then another problem is causing your AC freeze. If this is the case, merely thawing it out won’t repair the trouble. The evaporator coil will possibly freeze again unless you take care of the main cause. Contact an HVAC professional to address issues with your air conditioner, which may include: 

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t run low. Low refrigerant means there’s a leak somewhere. Only a professional can find the leak, repair it, and recharge the system to the correct concentration. 
  • Grimy evaporator coil: If dust accumulates on the coil, air can’t flow over it, and it’s likely to freeze. 
  • Malfunctioning blower: A defective motor or unbalanced fan can halt airflow over the evaporator coil. 

The next time your AC freezes up, get in touch with the ACE-certified techs at Service Experts Heating, Air Conditioning & Plumbing to repair the problem. We have lots of experience helping homeowners diagnose their air conditioners, and we’re certain we can get things running again quickly. Contact us at 866-397-3787 to schedule air conditioning repair in the U.S. with us right away. 

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