3 Simple Ways to Restore a Frozen Air Conditioner

Does the air coming from your supply registers abruptly appear not cold enough? Check the indoor portion of your air conditioner. This piece is situated in your furnace or air handler, if you rely on a heat pump. If there’s water dripping onto the floor, there may be crystals on the evaporator coil. The AC coil within 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 frost-free, Chief/Bauer Service Experts is here to help with air conditioning repair in Champaign upheld by a 100% satisfaction guarantee.*

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

To begin—move the thermostat from “cool” to “off.” This prevents cold refrigerant from flowing to the outdoor compressor, which could damage it and lead to a costly repair.

Then, adjust the fan from “auto” to “on.” This produces hot airflow over the frozen coils to make them defrost faster. Remember 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 most of the day for the ice to melt, depending on the extent of the accumulation. While you’re waiting, check the condensate pan below the AC unit. If the drain line is clogged, it might cause a mess as the ice melts, potentially creating water damage.

Step 2: Pinpoint the Situation

Not enough airflow is a prime cause for an AC to freeze up. Here’s how to figure out the situation:

  • Inspect the filter. Insufficient airflow through a dirty filter could be the problem. Inspect and replace the filter monthly or immediately when you see dust accumulation.
  • Open any sealed supply vents. Your home’s supply registers should remain open all the time. Closing vents limits airflow over the evaporator coil, which might cause it to freeze.
  • Look for blocked return vents. These typically don’t use adjustable louvers, but furniture, rugs or curtains can still block them.
  • Low refrigerant: While airflow restrictions are the most frequent cause, your air conditioning may also have insufficient refrigerant. Depending on when it was replaced, it may have Freon® or Puron®. Low refrigerant calls for professional attention from a certified HVAC tech. H2: Step 3: Contact an HVAC Expert at Chief/Bauer Service Experts

If inadequate airflow doesn’t appear to be the trouble, then something else is leading your AC freeze up. If this is the case, just defrosting it won’t fix the issue. The evaporator coil will possibly continually freeze unless you repair the underlying symptom. Contact an HVAC tech to check for issues with your air conditioner, which could include:

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t run out. Not enough refrigerant is a sign of a leak somewhere. Only a technician can pinpoint the leak, fix it, and recharge the air conditioning to the appropriate amount.
  • Filthy evaporator coil: If dirt collects on the coil, air can’t flow over it, and it’s likely to freeze.
  • Nonfunctional blower: A faulty motor or unbalanced fan can prevent airflow over the evaporator coil.

When your AC freezes up, contact the NATE-certified techs at Chief/Bauer Service Experts to take care of the issue. We have years of experience helping homeowners check their air conditioners, and we’re sure we can get things operating again in no time. Contact us at 217-689-2469 to schedule air conditioning repair in Champaign with us right away.


*Not applicable to the Advantage Program. See your signed Advantage Program agreement for full details and exclusions. 100% Satisfaction Guarantee is subject to certain restrictions and limitations as set forth in the applicable Terms and Conditions.

Contact Us