How to Fix a Frozen Air Conditioner

February 23, 2015

Summer’s coming (believe it or not) and here's an often cited scenario with the average homeowner: They’re at home, minding their own business, happily indulging a bowl of popcorn and watching their favorite TV show, when all of a sudden – that distant terrible sound; drip... drip... drip. They glance over to see the dog licking at a puddle that's gradually forming on the bathroom floor. Suddenly: Anxiety, stress, and that sinking feeling. Where did the leak come from?; water heater, leaky toilet, shower, faucet? Nope – the central air conditioner is frozen solid. This can happen anywhere, from Oklahoma City to Africa, regardless of climate.

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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 Oklahoma City area home. Usually there are two factors why the evaporator coil may freeze:

  1. Airflow restriction
  2. Insufficient refrigerant

Either way, the ending effect is that the air conditioner's evaporator coil does not properly disperse the heat, and consequently 'overcools' itself. The net effect 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 just turned into an old-school icebox.

What Might You Do When Your A/C Freezes?

  1. Turn the system completely off at the thermostat, and do not just move up the temperature on the thermostat. Ensure the A/C system is completely OFF.
  2. Confirm that there is nothing restricting the airflow to the system. Replace the furnace or air handler's filter along with any return air filters. Open all the registers completely and confirm that they are not impeded by furniture or drapes.
  3. Call Gordon's Service Experts Heating & Air Conditioning. 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 air conditioner freezes over it can lead to damage to the compressor. Replacing your compressor could cost as much as a downpayment on a high efficiency model. Actually, many homeowners are forced to choose between installing a new system vs repairing the old unit. If you follow the steps above and quickly call a NATE-certified technician, you have better odds of getting a less expensive emergency.

Your technician will advise you of the exact cause 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 most likely freeze again.
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