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How to Fix a Frozen Air Conditioner 

Summer’s coming (we promise) and here’s a typical scenario with the average homeowner: They’re at home, minding their own business, enjoying a bowl of popcorn and watching their favorite TV show, when suddenly he/she hears awful sound; drip… drip… drip. They look over to see the dog licking at a puddle that’s slowly forming on the bathroom floor. In a flash: Concern, stress, and that sinking feeling. Where did the leak come from?; water heater, leaky toilet, shower, faucet? No – the central air conditioner is frozen solid. This can strike anywhere, from the U.S. to Timbuktu, regardless of climate. 

Why Air Conditioners Freeze 

The evaporator coil is the component of a central A/C unit that actually freezes. This component of the air conditioner transfers (evaporates) heat from the inside to the outside of your the U.S. area home. There are two primary reasons the evaporator coil may freeze: 

  1. Airflow restriction 
  1. Lack of sufficient refrigerant 

Either way, the ending effect is that the air conditioner’s evaporator coil cannot operate to properly transfer heat, and in essence ‘overcools’ itself. The result of this super-cooling is condensation (that’s water formation), and eventually ice forms from that condensation as it cools below the freezing point. Yep, the A/C transformed into an old-school icebox. 

What Might You Do When Your A/C Freezes? 

  • Turn the unit completely off at the thermostat, and do not increase the thermostat temperature as a way to melt the frost on the coils. Just make sure the A/C system is completely OFF. 
  • Do what you can to ensure airflow is not restricted. Replace the furnace or air handler’s filter and replace any return air filters. Open all the registers completely and verify that they are not impeded by furniture or drapery. 
  • Call Service Experts Heating, Air Conditioning & Plumbing. The air conditioning system needs to be professionally inspected to ensure there are no refrigerant leaks or damage to the equipment. Simply schedule a Performance Inspection or Repair Diagnostic online, or call to talk to a live person right away. 

What Does it Cost to Repair? 

This can turn into a costly repair. When your unit freezes over it can lead to damage to the compressor. Replacing your compressor can cost as much as a downpayment on a new system. Actually, many homeowners are forced to decide between installing a new system or repairing the damaged model. If you follow the steps above and quickly call a ACE-certified technician, you have better odds of having a less expensive job. 

Your technician will quickly analyze the problem and how to avoid the issue from happening again. If a leak is present (and that is rare, but possible), the leak has to be repaired or the unit will likely freeze again. 

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