Simple Steps to Fix a Frozen Air Conditioner

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

Here’s what to do. 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. upheld by a 100% satisfaction guarantee.* 

Step 1: Set the Air Conditioning to Off and the Blower On 

To get started—set the thermostat from “cool” to “off.” This prevents cold refrigerant from flowing to the outdoor compressor, which could harm it and result in a costly repair. 

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

It can take less than an hour or the better part of a day for the ice to melt, depending on the extent of the buildup. While you’re waiting, watch the condensate pan underneath the AC unit. If the drain line is clogged, it could create a mess as the ice melts, likely creating water damage. 

Step 2: Pinpoint the Situation 

Insufficient airflow is a chief reason for an AC to become frozen. Here’s how to get to the bottom of the situation: 

  • Look at the filter. Poor airflow through a clogged filter could be the issue. Look at and change the filter each month or once you see dust accumulation. 
  • Open any sealed supply vents. Your home’s supply registers should remain open always. Shutting vents reduces airflow over the evaporator coil, which might result in it freezing. 
  • Be on the lookout for obstructed return vents. These usually don’t have shiftable louvers, but furniture, rugs or curtains can still obstruct them. 
  • Insufficient refrigerant: While airflow restrictions are the most typical suspect, your air conditioner could also be low on refrigerant. Depending on when it was replaced, it may use Freon®. Not enough refrigerant necessitates skilled support from a certified HVAC tech. H2: Step 3: Call an HVAC Expert at Service Experts Heating, Air Conditioning & Plumbing 

If low airflow doesn’t appear to be the issue, then another problem is leading your AC freeze. If this is what’s occurring, merely defrosting it won’t repair the trouble. The evaporator coil is likely to keep freezing unless you fix the main issue. Call an HVAC tech to look for troubles with your air conditioner, which may include: 

  • Refrigerant leak: AC units continuously use refrigerant, so it shouldn’t run out. Not enough refrigerant signals a leak somewhere. Only a pro can pinpoint the leak, repair it, and recharge the system to the appropriate level. 
  • Dirty evaporator coil: If dirt builds up on the coil, air can’t get to it, and it’s liable to freeze. 
  • Malfunctioning blower: A faulty motor or unbalanced fan may halt airflow over the evaporator coil. 

When your AC freezes up, call on the ACE-certified technicians at Service Experts Heating, Air Conditioning & Plumbing to fix the problem. We have lots of experience helping homeowners check 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 now. 

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