Fast Steps for Fixing a Frozen Air Conditioner

Does the air coming from your supply registers suddenly feel hot? Check the indoor component of your air conditioner. This component is located within your furnace or air handler, if you rely on a heat pump. If there’s water seeping onto the floor, there might be frost on the evaporator coil. The AC coil in the equipment may have frozen. You’ll need to defrost it before it can cool your house again. 

Here’s the steps you should take. If you can’t get the coil back to normal, 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: Set the Air Conditioning to Off and the Blower On 

To get started—move the thermostat from “cool” to “off.” This halts chilled refrigerant from moving to the outdoor compressor, which could harm it and cause a pricey repair. 

Next, adjust the fan from “auto” to “on.” This produces warm airflow over the frozen coils to force them to thaw faster. Make sure to set the cooling mode to “off” so the air conditioner doesn’t start a cooling cycle. 

It may take under an hour or the majority of the day for the ice to melt, depending on the degree of the buildup. While you’re waiting, check the condensate pan under the AC unit. If the drain line is clogged, it may create a mess as the ice melts, potentially creating water damage. 

Step 2: Pinpoint the Trouble 

Not enough airflow is a primary explanation for an AC to frost over. Here’s how to figure out the issue: 

  • Check the filter. Poor airflow through a dusty filter could be the culprit. Check and change the filter each month or as soon as you notice a layer of dust. 
  • Open any sealed supply vents. Your home’s supply registers should be open constantly. Closing vents limits airflow over the evaporator coil, which may cause it to freeze. 
  • Be on the lookout for obstructed return vents. These typically don’t use moveable louvers, but furniture, rugs or curtains can still block them. 
  • Low refrigerant: While airflow restrictions are the most frequent suspect, your air conditioner could also not have enough refrigerant. Depending on its age, it may rely on Freon®. Not enough refrigerant requires skilled support from a certified HVAC tech. H2: Step 3: Get in Touch with an HVAC Technician at Service Experts Heating, Air Conditioning & Plumbing 

If low airflow doesn’t feel like the issue, then another problem is leading your AC freeze up. If this is what’s going on, just defrosting it won’t repair the problem. The evaporator coil is likely to freeze again unless you repair the main cause. Contact an HVAC professional to look for problems with your air conditioner, which might include: 

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t run out. Insufficient refrigerant signals a leak somewhere. Only a professional can find the leak, fix it, and recharge the system to the correct concentration. 
  • Grimy evaporator coil: If grime collects on the coil, air can’t get to it, and it’s liable to freeze. 
  • Broken blower: A bad motor or unbalanced fan can prevent airflow over the evaporator coil. 

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

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