Quick Steps to Repair a Frozen Air Conditioner

Does the air flowing from your supply registers suddenly seem warm? Look at the indoor part of your air conditioner. This piece is located in your furnace or air handler, if you use a heat pump. If there’s water dripping onto the floor, there could be frost on the evaporator coil. The AC coil in the system might have frozen over. You’ll need to melt it before it can cool your house 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. that includes a a 100% satisfaction guarantee.* 

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

To get started—set the thermostat from “cool” to “off.” This stops chilled refrigerant from moving to the outdoor compressor, which could damage it and lead to a pricey repair. 

After that, move 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 start a cooling cycle. 

It could take under an hour or most of the day for the ice to melt, depending on the level of the buildup. While you’re waiting, watch the condensate pan below the AC unit. If the drain line is blocked, it may spill over as the ice melts, potentially resulting in water damage. 

Step 2: Pinpoint the Situation 

Insufficient airflow is a leading cause for an AC to become frozen. Here’s how to figure out the problem: 

  • Check the filter. Inadequate airflow through a dusty filter could be to blame. Check and change the filter once a month or as soon as you notice dust accumulation. 
  • Open any shut supply vents. Your house’s supply registers should stay open always. Closing vents limits airflow over the evaporator coil, which might lead it to freeze. 
  • Look for obstructed return vents. These typically don’t come with shiftable louvers, but furniture, rugs or curtains can still block them. 
  • Insufficient refrigerant: While airflow restrictions are the most typical culprit, your air conditioner may also not have enough refrigerant. Depending on when it was installed, it may have Freon®. Low refrigerant requires professional attention from a certified HVAC specialist. H2: Step 3: Call an HVAC Pro at Service Experts Heating, Air Conditioning & Plumbing 

If poor airflow doesn’t seem to be the trouble, then another problem is leading your AC frost over. If this is what’s going on, just defrosting it won’t fix the issue. The evaporator coil will probably continually freeze unless you repair the root problem. Get in touch with an HVAC pro to address troubles with your air conditioner, which might include: 

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t get used up. Insufficient refrigerant is a sign of a leak somewhere. Only a pro can locate the leak, fix it, and recharge the system to the correct amount. 
  • Filthy evaporator coil: If grime collects on the coil, air can’t get to it, and it’s apt to freeze. 
  • Nonfunctional blower: A broken motor or unbalanced fan could stop airflow over the evaporator coil. 

If your AC freezes up, contact the ACE-certified technicians at Service Experts Heating, Air Conditioning & Plumbing to take care of the situation. We have years of experience helping homeowners diagnose their air conditioners, and we’re certain we can get things operating again fast. Contact us at 866-397-3787 to book air conditioning repair in the U.S. with us now. 

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