3 Quick Steps for Repairing a Frozen Air Conditioner

Does the air coming from your supply registers suddenly appear warm? Check the indoor portion of your air conditioner. This piece is located within your furnace or air handler, if you have a heat pump. If there’s water leaking onto the floor, there may be ice 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 residence again.

Here’s the steps you should take. If you can’t get the coil frost-free, TML Service Experts is here to support you with air conditioning repair in Boise upheld by a 100% satisfaction guarantee.*

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

First things first—move the thermostat from “cool” to “off.” This halts chilly refrigerant from moving to the outdoor compressor, which could hurt it and result in a costly repair.

Next, adjust the fan from “auto” to “on.” This produces warm airflow over the frosty coils to help them defrost faster. Make sure to set the cooling mode to “off” so the air conditioner doesn’t trigger a cooling cycle.

It may take under an hour or the better part of a day for the ice to melt, depending on the amount of the accumulation. While you’re waiting, watch the condensate pan below the AC unit. If the drain line is clogged, it may overflow as the ice melts, potentially creating water damage.

Step 2: Troubleshoot the Issue

Insufficient airflow is a main explanation for an AC to become frozen. Here’s how to get to the bottom of the problem:

  • Look at the filter. Inadequate airflow through a dusty filter could be to blame. Inspect and put in a new filter monthly or once you notice dust accumulation.
  • Open any sealed supply vents. Your residence’s supply registers should be open constantly. Shutting vents reduces airflow over the evaporator coil, which may lead it to freeze.
  • Check for covered return vents. These typically don’t come with shiftable louvers, but furniture, rugs or curtains can still block them.
  • Insufficient refrigerant: While airflow restrictions are the most common cause, your air conditioning might also be low on refrigerant. Depending on when it was replaced, it may have Freon® or Puron®. Low refrigerant requires professional support from a certified HVAC tech. H2: Step 3: Call an HVAC Pro at TML Service Experts

If poor airflow doesn’t feel like the issue, then something else is causing your AC freeze. If this is what’s occurring, merely letting it melt won’t take care of the issue. The evaporator coil will probably keep freezing unless you take care of the underlying symptom. Contact an HVAC tech to address problems with your air conditioner, which can include:

  • Refrigerant leak: AC units keep using refrigerant, so it shouldn’t get used up. Insufficient refrigerant is a sign of a leak somewhere. Only a pro can find the leak, mend it, and recharge the system to the correct level.
  • Filthy evaporator coil: If dirt collects on the coil, air can’t reach it, and it’s liable to freeze.
  • Malfunctioning blower: A broken motor or unbalanced fan can halt airflow over the evaporator coil.

If your AC freezes up, call on the NATE-certified Experts at TML Service Experts to take care of the trouble. We have years of experience helping homeowners check their air conditioners, and we’re confident we can get things running again fast. Contact us at 208-488-4892 to book air conditioning repair in Boise 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.

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