3 Fast Ways to Repair a Frozen Air Conditioner

Does the air emitting from your supply registers unexpectedly feel warm? Check the indoor portion of your air conditioner. This component is housed within your furnace or air handler, if you use a heat pump. If there’s water dripping onto the floor, there may be frost on the evaporator coil. The AC coil inside the unit may have frosted over. You’ll need to melt it before it can cool your home again.

Here’s the steps you should take. If you can’t get the coil defrosted, D & K Heating Service Experts is here to support you with air conditioning repair in Belleville backed by a 100% satisfaction guarantee.*

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

First things first—set the thermostat from “cool” to “off.” This halts cold refrigerant from flowing to the outdoor compressor, which could hurt it and cause a costly repair.

Next, switch the fan from “auto” to “on.” This produces warm airflow over the frosty coils to force them to melt 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 degree of the buildup. While you’re waiting, keep an eye on the condensate pan below the AC unit. If the drain line is blocked, it can cause a mess as the ice melts, likely creating water damage.

Step 2: Diagnose the Situation

Poor airflow is a leading explanation for an AC to become frozen. Here’s how to figure out the problem:

  • Exmaine the filter. Low airflow through a clogged filter could be to blame. Look at and put in a new filter monthly or once you observe dust accumulation.
  • Open any sealed supply vents. Your residence’s supply registers should stay open always. Closing vents reduces airflow over the evaporator coil, which might lead it to freeze.
  • Check for blocked return vents. These often don’t come with moveable louvers, but furniture, rugs or curtains can still block them.
  • Low refrigerant: While airflow restrictions are the most frequent cause, your air conditioner might also be low on refrigerant. Depending on its age, it may have Freon® or Puron®. Insufficient refrigerant calls for professional assistance from a certified HVAC technician. H2: Step 3: Get in Touch with an HVAC Pro at D & K Heating Service Experts

If low airflow doesn’t appear to be the problem, then another issue is leading your AC freeze up. If this is what’s happening, simply thawing it out won’t fix the problem. The evaporator coil is likely to keep freezing unless you take care of the main problem. Contact an HVAC professional to look for problems with your air conditioner, which can include:

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t run low. Low refrigerant is a sign of a leak somewhere. Only a technician can locate the leak, repair it, and recharge the system to the appropriate amount.
  • Grimy evaporator coil: If dust builds up on the coil, air can’t get to it, and it’s likely to freeze.
  • Malfunctioning blower: A broken motor or unbalanced fan can stop airflow over the evaporator coil.

The next time your AC freezes up, contact the NATE-certified pros at D & K Heating Service Experts to take care of the problem. We have a lot of experience helping homeowners check their air conditioners, and we’re sure we can get things operating again in no time. Contact us at 613-707-2421 to book air conditioning repair in Belleville 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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