3 Easy Ways to Fix a Frozen Air Conditioner

Does the air emitting from your supply registers unexpectedly appear warm? Inspect the indoor component of your air conditioner. This piece is situated within your furnace or air handler, if you have a heat pump. If there’s water dripping onto the floor, there may be frost on the evaporator coil. The AC coil inside the equipment may have frozen. You’ll need to thaw it before it can cool your house again.

Here’s the steps you should take. If you can’t get the coil defrosted, Strogen's Service Experts is here to help with air conditioning repair in Rochester upheld 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 chilly refrigerant from moving to the outdoor compressor, which could damage it and result in a pricey repair.

After that, move the fan from “auto” to “on.” This produces heated airflow over the crystallized coils to make them melt faster. Remember to set the cooling mode to “off” so the air conditioner doesn’t begin a cooling cycle.

It can take less than an hour or the majority of the day for the ice to melt, depending on the extent of the buildup. While you’re waiting, watch the condensate pan underneath the AC unit. If the drain line is obstructed, it may spill over as the ice melts, likely causing water damage.

Step 2: Troubleshoot the Issue

Bad airflow is a prime reason for an AC to frost over. Here’s how to figure out the situation:

  • Exmaine the filter. Insufficient airflow through a dusty filter could be the culprit. Inspect and change the filter each month or as soon as you observe dust buildup.
  • Open any closed supply vents. Your house’s supply registers should be open all the time. Sealing vents decreases airflow over the evaporator coil, which may lead it to freeze.
  • Check for covered return vents. These usually don’t use shiftable louvers, but furniture, rugs or curtains can still obstruct them.
  • Not enough refrigerant: While airflow restrictions are the most frequent culprit, your air conditioner could also not have enough refrigerant. Depending on when it was replaced, it may rely on Freon® or Puron®. Insufficient refrigerant requires professional help from a certified HVAC technician. H2: Step 3: Call an HVAC Pro at Strogen's Service Experts

If inadequate airflow doesn’t appear to be the issue, then something else is making your AC freeze. If this is what’s going on, simply defrosting it won’t take care of the problem. The evaporator coil is likely to keep freezing unless you take care of the underlying symptom. Contact an HVAC pro to check for issues with your air conditioner, which can include:

  • Refrigerant leak: AC units continuously use refrigerant, so it shouldn’t run low. Not enough refrigerant means there’s a leak somewhere. Only a pro can pinpoint the leak, repair it, and recharge the air conditioner to the appropriate amount.
  • Grimy evaporator coil: If dust builds up on the coil, air can’t get to it, and it’s apt to freeze.
  • Broken blower: A defective motor or unbalanced fan can stop airflow over the evaporator coil.

When your AC freezes up, get in touch with the NATE-certified technicians at Strogen's Service Experts to repair the problem. We have lots of experience helping homeowners troubleshoot their air conditioners, and we’re confident we can get things working again fast. Contact us at 603-923-4570 to schedule air conditioning repair in Rochester 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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