3 Fast Ways to Repair a Frozen Air Conditioner

Does the air coming from your supply registers unexpectedly appear hot? Check the indoor component of your air conditioner. This piece is housed within your furnace or air handler, if you use a heat pump. If there’s water leaking onto the floor, there might be crystals on the evaporator coil. The AC coil within the system could have frozen over. 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 defrosted, Knochelmann Service Experts is here to help with air conditioning repair in Sharonville that includes a a 100% satisfaction guarantee.*

Step 1: Switch the Air Conditioning Off and the Blower On

To begin—move the thermostat from “cool” to “off.” This prevents cold refrigerant from moving to the outdoor compressor, which could damage it and cause an expensive repair.

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

It could take under an hour or most of the day for the ice to defrost, depending on the extent of the ice. While you’re waiting, watch the condensate pan below the AC unit. If the drain line is obstructed, it can overflow as the ice melts, potentially creating water damage.

Step 2: Pinpoint the Problem

Poor airflow is a chief cause for an AC to freeze up. Here’s how to troubleshoot the issue:

  • Exmaine the filter. Insufficient airflow through a filthy filter could be the culprit. Look at and change the filter once a month or once you observe dust buildup.
  • Open any shut supply vents. Your house’s supply registers should stay open always. Sealing vents decreases airflow over the evaporator coil, which can cause it to freeze.
  • Check for blocked return vents. These usually don’t use adjustable louvers, but furniture, rugs or curtains can still cover them.
  • Insufficient refrigerant: While airflow restrictions are the most frequent culprit, your air conditioner might also have insufficient refrigerant. Depending on when it was replaced, it may have Freon® or Puron®. Insufficient refrigerant necessitates professional assistance from a certified HVAC technician. H2: Step 3: Call an HVAC Pro at Knochelmann Service Experts

If inadequate airflow doesn’t feel like the issue, then another issue is leading your AC freeze. If this is what’s going on, just letting it melt won’t take care of the trouble. The evaporator coil will probably keep freezing unless you fix the underlying symptom. Contact an HVAC technician to check for problems with your air conditioner, which may include:

  • Refrigerant leak: AC units continuously use refrigerant, so it shouldn’t run low. Insufficient refrigerant signals a leak somewhere. Only a professional can find the leak, repair it, and recharge the air conditioning to the correct concentration.
  • Filthy evaporator coil: If dust accumulates on the coil, air can’t flow over it, and it’s liable to freeze.
  • Broken blower: A bad motor or unbalanced fan can halt airflow over the evaporator coil.

The next time your AC freezes up, contact the NATE-certified technicians at Knochelmann Service Experts to repair the situation. We have years of experience helping homeowners troubleshoot their air conditioners, and we’re sure we can get things operating again in no time. Contact us at 859-905-0834 to schedule air conditioning repair in Sharonville with us now.


*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.

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