3 Quick Steps for Repairing a Frozen Air Conditioner

Does the air coming from your supply registers abruptly seem not cold enough? Check the indoor component of your air conditioner. This component is housed in your furnace or air handler, if you have a heat pump. If there’s water leaking onto the floor, there could be frost on the evaporator coil. The AC coil in the system might have frozen. You’ll need to defrost it before it can cool your house again.

Here’s the things you should do. If you can’t get the coil frost-free, Boehmers/Cronin Emery Service Experts is here to assist you with air conditioning repair in Kitchener that includes a a 100% satisfaction guarantee.*

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

To begin—move the thermostat from “cool” to “off.” This halts chilly refrigerant from flowing to the outdoor compressor, which could damage it and cause an expensive repair.

Then, move the fan from “auto” to “on.” This creates warm airflow over the crystallized coils to help them melt faster. Make sure to set the cooling mode to “off” so the air conditioner doesn’t trigger a cooling cycle.

It could take less than an hour or the better part of a day for the ice to defrost, depending on the extent of the accumulation. While you’re waiting, watch the condensate pan under the AC unit. If the drain line is clogged, it may create a mess as the ice melts, potentially creating water damage.

Step 2: Diagnose the Issue

Low airflow is a primary explanation for an AC to freeze up. Here’s how to troubleshoot the issue:

  • Look at the filter. Poor airflow through a filthy filter could be the issue. Look at and change the filter monthly or as soon as you see dust buildup.
  • Open any sealed supply vents. Your house’s supply registers should remain open constantly. Shutting vents limits airflow over the evaporator coil, which could result in it freezing.
  • Look for covered return vents. These typically don’t use shiftable louvers, but furniture, rugs or curtains can still obstruct them.
  • Low refrigerant: While airflow restrictions are the most common culprit, your air conditioner might also have insufficient refrigerant. Depending on when it was installed, it may rely on Freon® or Puron®. Not enough refrigerant necessitates pro help from a certified HVAC tech. H2: Step 3: Contact an HVAC Pro at Boehmers/Cronin Emery Service Experts

If low airflow doesn’t feel like the issue, then something else is leading your AC frost over. If this is what’s happening, just letting it melt won’t take care of the trouble. The evaporator coil is likely to keep freezing unless you fix the underlying cause. Call an HVAC pro to check for issues with your air conditioner, which may include:

  • Refrigerant leak: AC units recycle refrigerant, so it shouldn’t run out. Not enough refrigerant indicates a leak somewhere. Only a specialist can pinpoint the leak, mend it, and recharge the air conditioning to the appropriate concentration.
  • Filthy evaporator coil: If dust builds up on the coil, air can’t flow over it, and it’s likely to freeze.
  • Nonfunctional blower: A defective motor or unbalanced fan may halt airflow over the evaporator coil.

The next time your AC freezes up, call on the NATE-certified Experts at Boehmers/Cronin Emery Service Experts to take care of the issue. We have years of experience helping homeowners check their air conditioners, and we’re certain we can get things running again quickly. Contact us at 519-804-1617 to book air conditioning repair in Kitchener 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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