3 Fast Steps to Repair a Frozen Air Conditioner

Does the air emitting from your supply registers suddenly seem hot? Inspect the indoor part of your air conditioner. This part is situated inside your furnace or air handler, if you rely on a heat pump. If there’s water leaking onto the floor, there may be ice on the evaporator coil. The AC coil in the unit could have frosted over. You’ll need to melt it before it can cool your residence again.

Here’s what to do. If you can’t get the coil frost-free, Service Experts Heating & Air Conditioning is here to assist you with air conditioning repair in Roanoke backed by a 100% satisfaction guarantee.*

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

To get started—move the thermostat from “cool” to “off.” This halts cold refrigerant from going to the outdoor compressor, which could damage it and result in an expensive repair.

After that, adjust the fan from “auto” to “on.” This produces hot airflow over the crystallized coils to make them defrost 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 degree of the ice. While you’re waiting, keep an eye on the condensate pan under the AC unit. If the drain line is clogged, it could overflow as the ice melts, potentially creating water damage.

Step 2: Diagnose the Trouble

Bad airflow is a primary reason for an AC to freeze up. Here’s how to troubleshoot the problem:

  • Inspect the filter. Poor airflow through a clogged filter could be the culprit. Look at and put in a new filter once a month or immediately when you see dust buildup.
  • Open any sealed supply vents. Your house’s supply registers should be open constantly. Closing vents limits airflow over the evaporator coil, which might result in it freezing.
  • Look for blocked return vents. These often don’t have adjustable louvers, but furniture, rugs or curtains can still block them.
  • Low refrigerant: While airflow restrictions are the most typical suspect, your air conditioner may also not have enough refrigerant. Depending on its age, it may rely on Freon® or Puron®. Insufficient refrigerant necessitates skilled help from a certified HVAC tech. H2: Step 3: Get in Touch with an HVAC Pro at Service Experts Heating & Air Conditioning

If insufficient airflow doesn’t appear to be the problem, then something else is making your AC freeze. If this is what’s occurring, simply defrosting it won’t take care of the problem. The evaporator coil will probably continually freeze unless you take care of the main issue. Call an HVAC tech to check for troubles with your air conditioner, which could include:

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t run out. Insufficient refrigerant indicates a leak somewhere. Only a technician can locate the leak, mend it, and recharge the air conditioner to the appropriate level.
  • Dirty evaporator coil: If dust collects on the coil, air can’t get to it, and it’s liable to freeze.
  • Malfunctioning blower: A defective motor or unbalanced fan may stop airflow over the evaporator coil.

If your AC freezes up, call on the NATE-certified professionals at Service Experts Heating & Air Conditioning to repair the trouble. We have years of experience helping homeowners diagnose their air conditioners, and we’re sure we can get things running again in no time. Contact us at 540-302-8645 to book air conditioning repair in Roanoke 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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