3 Quick Steps to Fix a Frozen Air Conditioner

Does the air flowing from your supply registers abruptly appear not cold enough? Inspect the indoor part of your air conditioner. This part is located within your furnace or air handler, if you rely on a heat pump. If there’s water seeping onto the floor, there could be frost on the evaporator coil. The AC coil inside the unit could have frozen. You’ll need to melt it before it can cool your residence again.

Here’s the things you should do. If you can’t get the coil defrosted, R & M Climate Control Service Experts is here to assist you with air conditioning repair in Knoxville backed by a 100% satisfaction guarantee.*

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

To begin—set the thermostat from “cool” to “off.” This stops chilled refrigerant from flowing to the outdoor compressor, which could harm it and lead to an expensive repair.

Then, move the fan from “auto” to “on.” This produces warm airflow over the frosty coils to make them melt faster. Remember to set the cooling mode to “off” so the air conditioner doesn’t trigger a cooling cycle.

It may take less than an hour or the better part of a day for the ice to thaw, depending on the level of the ice. While you’re waiting, keep an eye on the condensate pan underneath the AC unit. If the drain line is blocked, it could overflow as the ice melts, likely causing water damage.

Step 2: Pinpoint the Issue

Poor airflow is a leading explanation for an AC to frost over. Here’s how to figure out the issue:

  • Look at the filter. Inadequate airflow through a dusty filter could be to blame. Check and replace the filter once a month or once you see a layer of dust.
  • Open any shut supply vents. Your residence’s supply registers should stay open always. Sealing vents reduces airflow over the evaporator coil, which may result in it freezing.
  • Be on the lookout for obstructed return vents. These often don’t come with moveable louvers, but furniture, rugs or curtains can still cover them.
  • Not enough refrigerant: While airflow restrictions are the most common culprit, your air conditioning may also not have enough refrigerant. Depending on when it was replaced, it may have Freon®. Low refrigerant requires skilled support from a certified HVAC specialist. H2: Step 3: Contact an HVAC Tech at R & M Climate Control Service Experts

If insufficient airflow doesn’t feel like the problem, then another problem is making your AC frost over. If this is what’s happening, just letting it melt won’t fix the issue. The evaporator coil will probably freeze again unless you fix the main issue. Get in touch with an HVAC pro to check for problems with your air conditioner, which might include:

  • Refrigerant leak: AC units recycle refrigerant, so it shouldn’t run low. Low refrigerant is a sign of a leak somewhere. Only a professional can pinpoint the leak, fix it, and recharge the system to the appropriate concentration.
  • Dirty evaporator coil: If dirt builds up on the coil, air can’t get to it, and it’s likely to freeze.
  • Nonfunctional blower: A broken motor or unbalanced fan can halt airflow over the evaporator coil.

The next time your AC freezes up, contact the ACE-certified pros at R & M Climate Control Service Experts to repair the issue. We have years of experience helping homeowners diagnose their air conditioners, and we’re certain we can get things operating again fast. Contact us at 865-229-6176 to book air conditioning repair in Knoxville with us today.


*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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